IOSoccer

IOSoccer was previously known as International Online Soccer and was a Half-Life mod made by a small group of indie developers. Later it was rewritten with a new dev team who utilized the Source engine and presented it in its current game title. At its core, it's a free-to-play third-person online multiplayer soccer simulator. You start with character customization. You can choose the number and the name on your character's shirt. Apart from that, there are a lot of other adjustments to outfits and characters' appearance. You can even come up with a personal goal celebration and assigned it to your soccer teammates. The game features unique ball movement that combines mouse, keyboard, and the third-person camera view. The best goals can be reviewed in instant replays and highlights. Some missed chances can be reverted using intermissions. You can upgrade your skills whether in warm-up mode or during regular matches with other players. The game allows participation from 1 to 11 players. IOSoccer also makes it possible to switch between playable characters on the fly delegating their manipulation back to AI when needed. Modders can tweak the game any way they want starting from maps and ending with goalkeeper's gloves.