Half-Life 2 is a singleplayer-only title. If you mean Half-Life 2 Deathmatch, yes I own it but im not a fan of it and play it rare. By the way hl2 dm is free for everybody with an ati or nvidea-card http://www.steampowered.com/ati_offer1 http://www.steampowered.com/nvidia/ This is a official promotion from Steam.