RELATED: 10 Banned Video Games You Never Knew About In the last decade, Counter-Strike has attracted more attention than ever, and as a result, the number of mods for the series has grown as well. First started as a mod for Half-Life in the late '90s, Counter-Strikehas gained a level of popularity that is quite unmatched. It's one of the top multiplayer games out there and is regarded as a cult classic by many.