Eraser focuses on survival horror gameplay with exploration, setting the player loose with low health and ammo through a vast artificial hellscape inspired by Blame!'s megastructure, Control's oldest house, and M.C. Escher's drawings. It eventually shifts into familiar Doom-style combat.

There are two endings, with the true ending requiring 3 secrets to be accessed. Expected playtime is upwards of an hour for first runs but could be maxed approximately in 55 minutes if you're familiar with it.