Hands down favourite game of all time. Half Life was close but this baby takes the title. Spent more hours than I care to recall, at silly-oclock in the morning, planning my next move and aiming Blaster Launchers into random buildings to try and find the last little git on a mission! The very definition of EPIC!
That was great fun, trying to find the last alien and wandering around a corner to run out of action points whilst staring down the barrel of a gun, much easier just to blast the little feckers into orbit instead