Blockland - Blockland is a non-competitive multiplayer sandbox-style construction game. It's kind of like playing with legos on the internet.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
NERF Arena Blast - The website linked is not real page, just moddb page.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Blocksworld Wool - Download mods for Blocksworld!
Arma - Experience true combat gameplay in a massive military sandbox.