The thing about sequels is you know what to expect. The conventions of the franchise are usually well established; they're familiar, comforting even. They're what gives the game its identity.
Released in 1996, the original Resident Evil not only shifted PlayStations, but cemented the survival horror genre in gaming history. The game's original intro FMV uses real-life actors and features a scene where STARS Alpha member Joseph Frost is graphically ripped apart by Cerberus. Capcom had the intro toned down for the game's western release, warranting a 15 classification by the BBFC, although the PC port by Westwood a year later retained the intro with an 18 certificate. Either sets the tone.