This game is great because of all the options it has with the main game, such as other content like DayZ.

This game is a lot of fun when you want to take the role of knights or peasant workers in the medieval times.

Toribash is a great classic to play with friends when you want to literally rip eachother apart, and launch their body parts across an arena.

Civ 5 is a very good game to play when you have a bunch of friends together who want to see who would best control civilisations.

Killing Floor is a good game due to the pressure put on the player, as many types of specimens (zombies of this game) attack you from everywhere.

Left 4 Dead 2 is a very good zombie survival game, and a classic that revolutionised the genre.

Team Fortress 2 is a good and interesting take on the FPS genre, offering many classes to choose from to suit many players styles.

Garry's Mod is a great game to play when you want to screw around, or almost make anything your heart desires.

CS:GO Is a good game to play competively and brings fun to all fans of the FPS genre.