- First person shooter.
- Really difficult. Everyone dies in a few hits and all gear degrades in quality very quickly.
- Little to no HUD.
- Scavenging supplies and equipment is greatly encouraged. You won't be able to have the same gun for anything more than 2 hours.
- A persistant world similar to S.T.A.L.K.E.R., but on drugs.
- Like S.T.A.L.K.E.R. crazy shit often tends to happen, except its crazier and happens more often.
- Everything is hostile, or dead.
- Your character needs to eat and sleep.
- Your character becomes noticibly more insane as the game goes on.
- It rains a lot. Every now and then theres a total monsoon which will completely wipes things off the map, changing the game considerably.
- The game's world has its own really odd weather patterns. It might rain for a month straight, snow for a while, become incredibly hot soon afterwards for about a week, then go back to snowing. Then maybe it'll rain acid, for fun.
- The weather and climate have a huge impact on gameplay and your character. When it's really hot plastic equipment might begin to melt, when it's really cold metal components might freeze shut rendering guns useless. It might become so foggy that you wander through a forest and accidently collide with a bunch of crazy NPC's. The player needs to learn to adapt to the constantly changing world.
- Environments vary significantly, there are deserts, there are jungles, there are oceans and there are snowy mountain ranges. Sometimes a forest will suddenly and strangely end and a desert will begin, because the game's world is weird like that.
- Mutants
- Crazy people
- Aliens
- Monsters
- Aliens and Monsters
- Shitloads of black humour
- Survival horror elements
- Melee combat
- Lots of guns