20) Rust

Your First Day In Rust shows a montage of the things you might get up to in game, from crafting to shooting some poor sap. 

You wake up naked in the middle of nowhere. You must survive. Do whatever it takes. Gather resources, cook food, make a small hut, and call it home.

Inspired by games like DayZ and Minecraft, Rust is a survival game with a heavy focus on crafting. You may have noticed from the previous paragraph. And much like in DayZ, if you see another player, kill them. Show them no mercy, because they will show you none. Seriously, I can’t stress that enough. Just like you, they’re on the very edge of survival and have turned into animals, so when you see some other player in your game, pin him down and bash his head in with a rock. Then take his stuff. He probably deserved it anyway.

Although it’s still in Alpha and available on Steam Early Access, Rust is still one of the most popular indie games there is. And since it is still in Alpha, things get added to it all the time.

These three are either all about to die, or are about to share a meal. And then kill each other. Either way, they're all going to die.

In this video, players fight to take down a freaking attack helicopter.