Sleep
Unlike zombies, the player needs to sleep. When you need to sleep, the sleep moodle will show up on the screen. To sleep you need to find a bed or a sofa.
While sleeping, time will fast forward until you wake up. When you do sleep, tiredness and any effects of sleeping tablets, beta blockers and anti-depressants will disappear.
Failing to sleep will cause your accuracy when using weapons to drop. In addition, the player's field of view decreases, as described by the moodle description's "decreased awareness". So far, till 0.2.0 RC2, the player will suffer no consequences for remaining awake while exhausted for an indefinite period of time, but passing out due to exhaustion has been planned for future updates.