Steam 20th Anniversary Sale

Valve launched Steam on September 12, 2003, and we're super proud and incredibly grateful for what we've been able to do in the 20 years since. Steam's success is a direct result of the players and developers around the world who use it.

We thought it would be fun to look back at the top releases on Steam each year (many of which are on sale as part of this celebration, including all Valve titles!) and added some fun facts for both Steam and pop culture in general (in art or text form, or both). But, like, give us the same leeway you might with an aging grandparent: the dates and facts below are as correct as our collectively aging memories will allow.