Garry's Mod is an inexpensive, fun and hilarious game that can be almost anything you'd like it to be. A shooter, an RPG, a racing game, you name it and there is likely a multiplayer server for it.

Total War: WARHAMMER is an all around excellent game with some of the coolest features ever seen in the Total War series. My only complaint is the ridiculous DLC policy that has plagued recent titles.

Mount & Blade: Warband is perhaps the best medieval simulation game ever made. Satisfying, brutal combat, thousands of free game-changing mods and a low price make it a must buy.

Tom Clancy's Rainbow Six Siege has emerged as one of the most thrilling and difficult competitive shooters out there and is definitely worth the money. Warning: be prepared to die A LOT early on.

Project Zomboid is one of the most terrifying, hardcore and deep zombie survival simulators on the market and it is definitely worth the money you'll pay for it.

Rust is a hardcore survival game with active and skilled developers who try to listen to the community's recommendations. The game has its flaws but it is certainly worth the money.

Arma 3 provides intense, simulation level combat along with a huge and active modding community. While it may be higher on the price spectrum, you will easily get hundreds of hours out of this game.

Insurgency provides incredibly satisfying, immersive and realistic modern day combat that will keep you coming back over and over again, all for a price that drops as low as $5 on sale.

One of the most realistic, immersive, fun and addicting shooters ever made, all for a ridiculously cheap price. Hundreds of hours of fun for as cheap as $5 on sale.