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Alex Mercer Armor Prototype 2.png

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One virus, three weeks, millions dead...and I was there. My name was Alex Mercer, and my work is almost done.
~ Alex Mercer


Alex Mercer is the protagonist of the first Prototype video game, a man who wakes up in the GENTEK morgue with bizarre and horrifying powers and no knowledge of events prior to that point, aside from his name and that he was once a scientist. Confused, enraged, and determined to reclaim his past, he sets out to do so by hunting down his old colleagues.

In truth, the creature acting as the protagonist is not Mercer but the Blacklight virus, which was released by the real Alex Mercer moments before he was shot dead and infected. The virus reanimated his corpse and came to believe it was him; however, evidence suggests that their personalities differed quite sharply.

Power and Stats

Tier: 9-A | 9-A | 8-C | At least 8-C

Name: Alexander J. Mercer, also called "DX-1118", Codename: Zeus

Origin: Prototype

Gender: As a virus, he's technically genderless, but defaults to male as Alex Mercer but can become either gender if he wishes.

Age: 29 (Human Memories), virus Mercer is only about 2 Years Old by the start of the second game.

Classification: Blacklight Virus, Bioweapon

Superhuman Physical Characteristics, Skilled Hand-to Hand Combatant, Enhanced Senses (Thermal Vision, Infected Vision, Viral Sonar), Acrobatics (Enhanced Condition, Hypermobility, All-Terrain Mobility, Surface Running), Regeneration (Low-High. Regenerated after being reduced to a bloody pulp by a nuclear explosion. Likely has similar healing capabilities as The Supreme Hunter, which could regenerate its body from a puddle of blood), Immortality (Types 1, 2, 3, 6, 7), Statistics Amplification through various abilities, Shapeshifting (He is able to transform into anyone he's consumed, He can also modify his body's proportions and form them into weapons at will), Absorption (Absorbs the powers, abilities, memories, skills, and experiences of any living thing he consumes, with any part of his biomass. This also allows him to negate his target's regeneration capabilities. Every living being that he absorbs makes him stronger), Biological Manipulation (Molecular level, Can manipulate all traces of the virus in existence down to the molecular level. Can manipulate the target's body through the virus), Disease Manipulation (Can infect his targets with the virus. The Blacklight Virus should be superior to the Redlight Virus, which was able to infect living beings and inanimate objects alike), Can run up walls and other vertical surfaces, Adaptation and Limited Reactive Evolution (Capable of producing hundreds of different strains of the Blacklight virus, can transform his body on-the-fly, increases his resistance to harmful situations with prolonged exposure, developed immunity to Bloodtox and the Parasite, developed unique powers to help fight Blackwatch and the Infected), Density Manipulation (Has the biomass of thousands of people inside of him, and can manipulate his body in many ways, such as gliding), Limited Matter Manipulation (Can transform his flesh-like biomass into metal-like structures capable of slicing through any armored vehicle, can convert anything a person is wearing into biomass (even capable of replicating electronic devices), can infect the molecules of his targets and control them through the Blacklight Virus), Stealth Mastery (Stated to be a security nightmare, cannot be detected by viral sonar, able to evade viral detectors), Mind Control via the Hive Mind (Can manipulate the minds of all the infected), Mind Manipulation (Should be able to replicate Greene's abilities), Limited Telepathy via the Hive Mind, Shield Generation (His shield can absorb damage before being destroyed and needing to regenerate), Can summon and create Blacklight beings, Homing Attack via Tendril Barrage Devastators, Power Bestowal (Can selectively seek out those with resilient DNA), Limited Precognition (Greene was able to show Alex her past memories as well as a glimpse of a future infected Manhattan. Not combat applicable however)

Flight via Airtime (allows Alex to fly indefinitely), Gravity Manipulation via Anti-Gravity Field (anything that Alex hits/touches becomes trapped in an anti gravity field, floating helplessly. This extends to people/objects that are hit by people/objects thrown at them by Alex), Energy Manipulation via Warp Vortex (objects thrown by Alex will become engulfed in a vortex of energy, pulling in nearby objects and people, causing severe damage. Only one vortex can be created at a time, whether or not this is a game mechanic is unknown), Vibration Manipulation via Shockwaves (makes it so every time Alex jumps into the air, a massive shockwave pulls everything up with them) [see note at the bottom regarding the use of Force Multipliers in versus matches)

Resistance to Mind Manipulation (Resisted Greene uploading visions into his head, led the Hive Mind), Radiation Manipulation, Cold Temperatures, Extreme heat (Survived a nuclear fireball. Has withstood thermobaric explosions, which can reach high temperatures), Disease Manipulation (Adapted to The Parasite, which has nullified many of his abilities previously, through absorbing the necessary antibodies. Has also absorbed Elizabeth Greene, who was able to resist the properties and effects of the Parasite, thus should gain her resistance), Biological Manipulation (Mercer was growing more resistant to biological chemicals made specifically to harm infected beings like him such as Bloodtox which can cause necrosis.), Immunity to all ailments known to man(Was able to infect the cure designed to destroy the Blacklight Virus) and Soul Manipulation (A virus doesn't have a soul, plus Alex was a corpse reconstructed by the virus)

Attack Potency: Small Building level (Can fight off and harm Hunters, although weaker than them prior to absorbing several. Hunters can crush/explode tanks by jumping on them without getting harmed. Threw a car hard enough to destroy a Helicopter at a distance) | Small Building level (Has grown vastly stronger with the various enemies he has absorbed. Can double his strength with muscle mass.) | Building level (Has casually overpowered mid-game James Heller, who shortly after the encounter was able to content and defeat a Goliaths, even before he has absorbed the Evolved. Alex Mercer is stated to be the pinnacle of Blacklight evolution” and “undisputedly the most powerful of those infected with the virus which means he would be more powerful than Goliaths) | At least Building level (Has consumed eight Evolved, who should at least be comparable to his Prototype 1 self, and added their combined strength to his own)

Speed: Subsonic travel speed (Can outrun even the fastest vehicles, including AH-64 Apache Helicopters), with Supersonic+ reactions and combat speed (Can react to and dodge M1 Abrams tank shells, which fire at Mach 4.6. Blocked a grenade launcher shot, and can dodge and outrun helicopter gunfire) | Subsonic travel speed (Has only become more powerful with every being he consumed since then; moved from the top floor of an apartment to the ground before Dana could react and blitzed an entire team of security guards), with at least Supersonic+ reactions and combat speed | At least Subsonic travel speed, with at least Supersonic+ reactions and combat speed | At least Subsonic travel speed, with at least Supersonic+, likely Hypersonic reactions and combat speed (Is much faster than his previous self. Consumed 8 Evolved and added their combined power to his own. Could move even faster in short bursts)

Lifting Strength: Class 5 (Can pick up and throw cars, trucks, helicopters and tanks at long distances) | Class 100 (Threw a van hard enough to send an A.P.C. flying, and then sent said A.P.C. across the cloud district with a single hand. Has grown vastly stronger with the various enemies he has absorbed. Can double his strength with muscle mass) | At least Class 100 (Has once again gotten vastly stronger through absorbing the other Evolved)

Striking Strength: Small Building Class (Can strike hard enough to destroy the head of a Supreme Hunter, which are unaffected by landing on tanks hard enough to destroy them) | Small Building Class (Has grown vastly stronger with the various enemies he has absorbed. Can double his strength with muscle mass) | Building Class (Has grown vastly stronger with the various enemies he has absorbed. Can double his strength with muscle mass) | At least Building Class (Has once again gotten vastly stronger through absorbing enemies)

Durability: Small Building level (Wasn't significantly harmed by the explosion of an apartment, anti-tank weaponry. Can withstand attacks from Hunters.) | Small Building level (Has grown vastly stronger with the various enemies he has absorbed. Can double his strength with muscle mass) | Building level (Has grown vastly stronger with the various enemies he has absorbed) | At least Building level (Has once again gotten vastly stronger through absorbing enemies). Regeneration makes him very difficult to kill. Higher with his shield and armored form.

Stamina: Limitless. He has never shown to actually physically tire out. His physiology is a sapient virus and he can operate without needing internal organs, like his brain, to be intact.

Range: Extended melee range. Several meters with shockwaves, and dozens of meters with Whipfist. Devastators can cover sizable areas. Possibly tens of kilometres with tendrils (The biomass gained from consuming Alex Mercer allowed James Heller to be able to create tendrils that can reach across all of Manhattan and wipe out all infected beings in New York City)

Standard Equipment: None notable

Intelligence: As a human, he is a GENTEK scientist, got University and National level award. Now, as he possesses the knowledge and memory of the thousands of people he consumed. Connecting himself with the Core Hivemind allows him to access the memories of every person affected by the Blacklight Virus. Extensive knowledge of biology from his past as a biochemist and is extremely well versed in military procedures, protocols, and tactics and combat. Knowledgeable in other fields of science as well from consuming dozens of scientists. Fully capable of utilizing nearly any military asset including tanks and helicopters after consuming hundreds of soldiers and can even shoot someone's vitals while moving at full speed and jumping over thirty feet into the air.

Weaknesses: Reminding him of his human life will cause him to relapse into a flashback, paralyzing him (Overcame this at the end of the first game). If he is too low on biomass he will be incapable of maintaining his Evolved form. Can be easily enraged, but has begun avoiding it.

Notable Attacks/Techniques:

  • Claws: Alex's biomass is shifted into 4-digited, talon-like, metal-like appendages that can be used to shred flesh and bone, cutting both the infected and military in half with a single sweep in some cases. By shoving his hand in the ground, he is able to make spikes shoot up from underground at range, with enough power to destroy M1A2 Abrams tanks and toss them dozens of feet into the air.
  • Hammerfists: By shifting large amounts of biomass towards the forearms, large hammer-like weapons are formed that are excellent for shattering both armored vehicles and infantry. Sacrifices speed for power and destroys tanks effortlessly while turning human enemies to paste. Can destroy even Heller's shields in Prototype 2 with little effort.
  • Musclemass: Alex's arms grow more muscular, doubling his strength and power in all areas. Alex doesn't lose any speed or accuracy for this power, allowing him to casually throw tanks for multiple city blocks. With Musclemass Boost, his power exceeds the standard 2x multiplier.
  • Whipfist: Alex's arm becomes a thin, flexible, blade-edged arm that can be used to attack targets that are dozens of meters away or sweep through entire crowds of enemies.
  • Blade: Alex's arm grows into a large blade, extended past his forearm and elbow. With this he is able to slice through his enemies with ease, cutting through tank armor as if it were made of cardboard and using it as a tool to take down even the most powerful infected with relative ease.
  • Shield: Alex can from a shield-like object on his arm that nullifies incoming damage until it breaks. Low-high caliber ballistics are ineffective against it, instead being reflected back at the senders. And if timed precisely, it can even deflect missiles. Upon being broken since it isn't designed for repeated high-energy impacts, but rather quick, on-the-move protection, it will need to regenerate.
  • Armor: Creates a solid black carapace around Alex's body, heavily reducing incoming damage at the cost of reducing his mobility, rendering him incapable of gliding or dodge rolling. Can be utilized with any other power aside from the Shield.
  • Adaptive Parkour: Alex is able to run and maneuver through areas with superhuman speed and agility, instantly adapting to things such as jumping over incoming cars, running on the walls of skyscrapers, and is able to change direction mid-air and even glide through the air.
  • Thermal Vision: Alex is capable of seeing the infrared spectrum, allowing him to see enemies through thin obstacles and operate even in complete darkness and smoke. 
  • Infected Vision: Alex is capable of detecting the presence of the Blacklight virus in individuals, allowing him to track infected targets easily and discern who is infected and who is not with just a glance. This also heightens his senses, allowing him to minimize the noise from the background of NYC.
  • Viral Sonar: Alex has developed a potent hunting sense. This sixth sense allows him to find a target and guide himself beyond the visual spectrum on a city-wide scale, allows him to see the target's nervous system.
  • Tendril Barrage Devastator: Alex sends countless tendrils in all directions, seeking out and impaling living things in all directions. The effective area of this attack is wide enough to cover Times Square, likely much farther, since Heller's tendrils consumed all of Manhattan after consuming Mercer. Can be used in mid-air.
  • Groundspike Graveyard Devastator: Alex shoves his fists in the ground, and large, 15-25 foot biomass spikes from underground shoot up around him in a span of 20-30 feet, destroying, destroying and tossing tanks to air and impaling even well-armored enemies.
  • Critical Pain Devastator: His most powerful devastator, Alex pushes his hands forward, ejecting a number of tendrils with intense air pressure, though it only works on a singular target.
  • Infected Creator: Alex unleashes an explosion of viral vapor that instantly turns living organisms caught in its radius into various infected creatures, or kills them. Having the virus spread via almost every form of transmission in Prototype 1 (It seemed incapable of crossing water bodies), within 12 days , 81% of Manhattan was infected. This allows him to turn people and animals into infected beasts and minions.
  • Evolved Form: With enough biomass, Alex is capable of utilizing it to increase his power to extraordinary levels of speed, strength, durability, and regeneration.
  • Flash Step: By shifting Biomass into his legs, Mercer is capable of moving at speeds beyond Heller's perception in short bursts.
  • Cannonball: Alex tucks and rolls, turning himself into a spiked ball. Slicing through the air at high speed to unleash a deadly splash impact on his target. The Cannonball has excellent range and tracking, making it an outstanding attack against aircraft.
  • Artillery Strike: In a military uniform, Alex can order a military ordinance strike at his targeted location, capable of destroying fortified buildings and military bases.
  • Bulletdive Drop: From the air Alex propels himself downwards at supersonic speeds for a maximum-impact splash. This move is extremely devastating as it can destroy multiple military vehicles and even fortified bases on impact.
  • Groundshatter Drop: Mercer pounds the ground, creating a street wiping shockwave to turn human class enemies into paste or to give himself some breathing room. He can charge it in mid-air to increase the force behind the attack.
  • Air Groundspike Graveyard Devastator: Mercer chains a Groundshatter Drop into a Groundspike Graveyard Devastator.
  • Knuckle Shockwave: Alex pounds his fists together to blast opponents away from him. Not as damaging as the groundshatter, but it has a larger radius and less recovery time. Can be performed in mid-air.
  • Adrenaline Surge: When near death Mercer gains a moment of invulnerability and access to a free devastator attack without wasting any of his available biomass supply to turn the tables.
  • Critical Mass: Alex goes beyond the constraints of maximum health, increasing his max damage output, and is able to use 3 devastator attacks before needing to consume to replenish himself.
  • Flying Kick: By ejecting biomass to propel Mercer in a specified direction at high speeds Mercer can perform a powerful kick in which he can chain unorthodox combos and techniques like: Body Surfing, Flip Kick, Snap Kick etc.
  • Palm Slam: Mercer moves his palms forward with so much force that it can generate a small and focused continuous air blast accompanied by tendrils that absolutely destroy any singular enemy.
  • Shockwave: By exerting surplus supply of biomass into his legs, Mercer can cause a tremendous shockwave that covers entire streets even takes objects like trucks and APCs into the air, destroying them in the process.
  • Razor Spikes: When in danger, Mercer can call upon a set of steel-like spikes to come out from his body to impale anything in near physical contact, similar to a porcupine.
  • Mental uploading: Mercer can upload memories and visions of his own, and by extension anyone he's consumed or infected, by touching his target. He can likely share parts of the hive mind as well. Greene first demonstrated this by showing Alex her past, and glimpses of the future.
  • Hive Mind: A telepathic link between Mercer and the millions of infected, which, at its peak, was 81% of Manhattan's population. This allows him to control them, as well as reveal their location. Mercer before consuming Greene, could demonstrate a premature use of this ability. He could also immerse himself in all the minds of the infected. This ability expanded in Prototype 2 when the virus spread from Manhattan to Brooklyn and Staten Island.

Force Multipliers:

  • Medusa's Wrath: The user fires a beam of energy from their eyes that kills whatever it hits in one shot, effective against other Runners
  • Airtime: Allows the user to fly indefinitely
  • Anti-Gravity Field: Anything that Alex hits/touches becomes trapped in an anti gravity field, floating helplessly. This extends to people/objects that are hit by people/objects thrown at them by Alex
  • Warp Vortex: Objects thrown by Alex will become engulfed in a vortex of energy, pulling in nearby objects and people, causing sever damage. Only one vortex can be created at a time, whether or not this is a game mechanic is unknown
  • Shockwave: Alex leaps into the air, creating a shockwave that pulls nearby objects up with him


  • The powers and abilities from the Force Multiplier DLCs are non-canon, as they do not make sense in the context of the story and mostly serve as a means to allow the player wreak more havoc during gameplay. If they are to be used in a versus match, then it should be stated in the OP
  • Alex is viral biomass, so he cannot run out of "himself". On that note, his regeneration capabilities aren't reduced by the amount of biomass he has, but his regeneration speed is.

Key: Prototype 1 Early/Mid Game | Prototype 1 End Game | Prototype 2 | Prototype 2 End Game


Notable Victories:

Notable Losses:

Inconclusive Matches:

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