I just checked and i actually have everything apart from: L4D2, DOTA, TF 2, CS:GO, Condition Zero, DoD:Source and Portal.
I don't usually play online and some Portal solutions do my head in so i can't play for too long so i've only really played the Half-Life series.
I don't usually play online and some Portal solutions do my head in so i can't play for too long so i've only really played the Half-Life series.