Here's my go-to games list:
Beat Hazard
Skyrim
Left 4 Dead 2
Garry's Mod
Sniper Elite: Nazi Zombie Army

Free games:
Team Fortress 2
APB: Reloaded
Planetside 2

RaitoKunRyuk wrote Here's my go-to games list:
Beat Hazard
Skyrim
Left 4 Dead 2
Garry's Mod
Sniper Elite: Nazi Zombie Army

Free games:
Team Fortress 2
APB: Reloaded
Planetside 2

Should add warframe to that list

Nas- wrote What are some cool pc games i can download ?

DeadZ, it seems a good game from pictures I've seen. I will let 10wnu9 tell you about it... He plays it.

There's a game called DeadZ, It's the free to play version of Infestation Survivor Stories, it's great. If you did plan to play you would need my invite key. The graphics are outstanding and it even beats DayZ and the Standalone (from experience). It's one of the only games that's ever been able to shock me sometimes because it's simply unexpected when you launch into PVP. Great Game. There's also a web based game called WarFace which Is almost better than BF3 in ways. Check it out and tell me what you think.

All the games that RaitoKunRyuk said are good games.

Also, if you enjoy Rhythm Games, I'd choose osu! over Beat Hazard but it just depends on what games you like.
Also, StepMania is another pretty good Rhythm Game (a free game inspired by Dance Dance Revolution - and very hard [at least for me]).

Team Fortress 2 is a game you definitely need to try out (if you haven't already). It's free on Steam and is great fun.

Also, try out Dota 2 or League of Legends if you're into MOBAs (I'd personally choose League of Legends over Dota 2).

Soldier Front 2 is a pretty cool first person shooter. It's not exactly good for it's Team Deathmatch and all those types of gamemodes. If you download the American version (not the European version sadly), there's a 'Hero Mode' which is basically a first person MOBA. A very unique gamemode. There are some pretty cool gamemodes. There's one like the 'spleef' minigame if you've ever played Minecraft, but in the style of a first person shooter. Surprisingly, it really fits in well with the game.

Minecraft is a very good game and can supply endless hours of fun (especially with mods).

I own DayZ (standalone) and have hardly played it but it seems like you have to be very patient in order to have fun with the game. I'm not a very patient person so I haven't enjoyed my experience with it. The game is a zombie survival game. I played it for half an hour and found not a single zombie. I was walking in a straight line the whole time and was getting extremely bored. I eventually just had to exit the game. Also, the servers are pretty bad.

RaiderZ is now on Steam. I played it for a little while, it seems pretty good.

Garry's Mod is a very fun game, especially with friends on Trouble in Terrorist Town or Prop Hunt.

Mortal Online. I haven't really played it myself but it seems like a MMORPG version of Skyrim. You get all the skills and stuff. It's a pretty hardcore game, if you die, you lose everything (as far as I know). So if you're one of those people who rage a lot... this game probably isn't for you.

Aion is a pretty good MMORPG but I personally got bored of it within a few weeks.

I've heard RIFT is a good game but haven't played it myself.

My friend said that the game 'Chivalry' is pretty fun but I haven't played it myself.

I'm not a fan of singleplayer games but The Walking Dead (the one by TellTale games - the other one is horrible) is a very good game and the end is pretty sad (I won't spoil any of it for you).

The multiplayer on the Assassin's Creed games are very fun.

I'm really not into these kinds of games but a friend is. Try out Skyrim if you haven't played it yet.

I've heard some pretty good things about the game 'Nether'.

Terraria is pretty fun although I'd much rather play Minecraft.

Left 4 Dead 2 is pretty fun. The versus mode is very fun. It's especially fun with friends and there are many mods to make the game as hilarious and silly or serious and dark as you want.

I hope I've given at least one game that you'll enjoy.
Good luck finding a good game!

BF3/4
DayZ Standalone or DayZ mod
Arma 2/3 (war simulator)
L4D2
Red Orchestra 2/ Rising Storm
Planetside 2 (free to play)
Skyrim + mods
Cry of fear (really scary horror game + free to play)
Natural selection 2
Chivalry medieval warfare (best sword fighting game)
Team fortress 2 (easy to run + free to play)
Assetto Corsa (racing simulator)
World of Tanks (good fun + free to play)
War thunder (amazing 1918-1960s war plane dog battles + free to play)
Surgeon simulator
Call of duty WAW (only because of 120+ multiplayer servers and zombie mods)
Dota 2 (I hate these types of games, but you might like it + free to play)

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