SUPERHOT

Superhot sets the player in a minimalistic environment, taking out hostile attackers that are trying to kill them. Weapons picked up by the player have limited ammunition, requiring the player to rely on defeating enemies to get more ammo, or making melee kills. Taking a single hit from an enemy bullet kills the player, requiring them to restart the level. Though the game mechanics are typical of most shooters, the distinguishing feature is that time only moves forward at normal speed when the player performs an action like moving or firing a gun, otherwise time moves very slowly; this is described in the game's tagline "Time Moves Only When You Move".

Source: Wikipedia, "Superhot", available under the CC-BY-SA License.