Garry's Mod, the sandbox physics game based on Half-Life 2, has surpasses one million sales on Steam after five years of availability. For half a decade, the mod has been updated by Garry Newman, and has earned a great deal of respect from its supporters.
Newman has been planning a large update to Garry's Mod to coincide with the landmark sales figure, but that checkpoint was reached before he was finished. The update is coming, but you'll have to wait a while. That's something to look forward to!
Over 1,000,000 Sold! [Garry's Mod]