Portal is a series of first-person puzzle-platform video games developed by Valve Corporation.

Borderlands is a series of action role-playing first-person shooter video games in a space western/science fantasy setting.

World of Tanks is a massively multiplayer online game.

Left 4 Dead is a cooperative first-person shooter video game with survival horror elements.

Killing Floor is a cooperative first-person shooter video game.

Fable is an action role-playing video game series.