DOOM (1995)

DOOM (1995) — first-person shooter in the horror genre. The player is asked to alternately explore levels of varying difficulty, solve spatial and (rarely) logical problems, find hiding places, destroy as many monsters as possible and survive. The levels are intricate labyrinths with many doors, keys, elevators, shafts, buttons and secret rooms.

Instead of floors there may be lava, acids of varying strengths, water, toxic waste. Most levels have teleporters that instantly transport the player to another location in the current level. Some areas of the floor are able to move in a vertical direction (either with or without the player's desire), others can turn from stone into acid (usually this appears as the floor sinking into the waste surrounding it), others open secret doors with an ambush (technically this is done when crossing the border between areas, and not when being in one of them).