Half-Life 2 is not so strange for those gamers.Now officials release Half-life 2 Capture the flag 2.0 as free game,the players need to take enemy’s flag on the enemy’s headquarters and bring it back.
Official Website :http://hl2ctf.com/
Installation Guide :http://hl2ctf.com/?q=installation
Half-life 2 Capture the flag 2.0 running on the Free Source SDK,come with seven unique capture style game modes,four custom weapons,five unique game modes,four game mode overlays and more.
Download Half-life 2 Capture the flag 2.0 game from official website,you need to install Stream client before install Half-life 2 Capture the flag 2.0 game.
Stream Client :http://cdn.steampowered.com/download/SteamInstall.msi