GamesRadar - Video games have come a long way since their inception. In the beginning, they often took the form of text-based adventures and ambiguous displays of pixels meant to represent characters or objects. Now? We've got visuals so stunningly realistic that it's sometimes hard to tell a virtual car from a real one, and bite-sized downloadables stylized as throwbacks to the old days. But we wouldn't be where we are today without the following 50 games--the most important ones of all time.