History VideoGame / Vaccine

Besides [[UsefulNotes/PlayStation PS1-era]] graphics, tank controls, and fixed camera angles in the style of classic survival horror games, ''Vaccine'' also has [[ProceduralGeneration procedurally generated]] RandomlyGeneratedLevels and character leveling. Players take the role of one of two special operations police officers who are sent to investigate a mansion and find themselves trapped inside. When one of the officers becomes infected, it falls upon the other to find the vaccine and save their partner.

* EvilDoppelganger: One of the notes you can find is by a researcher who recently killed a zombie alternate version of themselves, and is understandably shaken. In ''Rebirth'', one of the enemies you can encounter in the final loop is a zombie version of your character.

* TheNineties: ''Rebirth'' establishes that the games take place in the 1990s, in the same time period as the first ''Resident Evil'' from which it draw inspiration.
* CheckpointStarvation: The entire game has to be beaten in one go, as there is no saving. Getting the "true" ending requires a minimum of 3 loops and takes at least an hour.

* EliteZombie: In the original game, the reptilian-like crawlers are extremely dangerous, and once alerted are capable of outright killing you with nothing you can do about it if you're only armed with a knife. You need to take them out with either firearms, proximity mines, or use a repellent so they won't attack you then knife them to death.

A VideoGameRemake of the game, ''Vaccine Rebirth'', made on a newer version of Unity, was released on May 25th, 2023. The rooms have been completely redone and are slightly more coherent, the gameplay and combat is slightly less indiejank, and some quality of life improvements have been added such as an in-game map and a document viewer, but overall it looks and plays similar to the original game, with the same plot and ultimate objective.

* GiantMook: The vaccine is guarded by a Tyrant-like giant monster. It's very tough and takes several shotgun blasts to kill, but is relatively slow and can be avoided. Killing it gets you a custom pistol that's more powerful than the standard one. In ''Rebirth'', the creature is instead released from a containment pod when you pick up the vaccine; it's faster than it was in the original game and will chase you through the mansion.

* GiantMook: Acquiring the vaccine wakes up a Tyrant-like giant monster who starts pursuing you through the mansion.

A VideoGameRemake of the game, ''Vaccine Rebirth'', made on a newer version of Unity, was released on May 25th, 2023. The rooms have been completely redone and are slightly more coherent, and the gameplay and combat is slightly less indiejank, but overall it looks and plays similar to the original game, with the same plot and ultimate objective.

* TheNinties: ''Rebirth'' establishes that the games take place in the 1990s, in the same time period as the first ''Resident Evil'' from which it draw inspiration.

Besides PS1-era graphics, tank controls, and fixed camera angles in the style of classic survival horror games, ''Vaccine'' also has [[ProceduralGeneration procedurally generated]] RandomlyGeneratedLevels and character leveling. Players take the role of one of two special operations police officers who are sent to investigate a mansion and find themselves trapped inside. When one of the officers becomes infected, it falls upon the other to find the vaccine and save their partner.