Garry's Mod is probably the coolest mod ever made, it's amazing what the communities can come up with, and the things they can make!

Used to be my favorite WW2 game, but then I got Day of Defeat, which you can make your own maps for and add sound plugins and lots more player-customizable content. But still one of the best WW2 games out there.

My favorite singleplayer game, really difficult at some parts but it's really fun!

A WW2 game made by Valve, theres a spot for everyone in this game, you can rush in as a light machine-gunner, or you can camp and cover people as a sniper, and if you just wanna mow people down with an MG, you can do that too! Although if you like spawn killing, I don't think this game is for you, the spawns are all blocked off so people can only go OUT of them, and usually you can't shoot into the spawn area. Also has player-made maps since Valve lets players use their mapping tool, Hammer.

The BEST console game ever made. Don't try to argue with me.