Competitive matches: Participate with your club, national team or mix team in leagues and cups organized by the community.Public matches: Join and leave public servers with casual matches whenever you want to.AI and human goalkeepers: You can let the server control the keeper or take its position yourself on the fly.Flexible team sizes: Whether you prefer 4v4 street games or our standard 8v8 matchups, we support everything from 1 to 11 players per side.Skill moves: Show your mastery of the game with bicycle kicks, diving headers, ball flicks, and precision dribbling.Unparalleled freedom in ball control and gameplay depth: The combination of a third-person camera together with mouse and keyboard input gives you full control over your dribbling, shooting, and passing.

Since the last public release, the game’s code has been completely rewritten, new player models created, and countless new gameplay features added.

Originally released 15 years ago under the full name International Online Soccer as a Half-Life mod, the game was later ported to the Source Engine and re-released in 2008. IOSoccer is a free non-commercial competitive third-person online multiplayer soccer game that offers unparalleled freedom in ball control and gameplay depth.