Open Sonic is a free open-source game based on the "Sonic the Hedgehog" universe. It introduces a different style of gameplay called cooperative play, in which it's possible to control 3 characters simultaneously. Unlike most similar games, Open Sonic provides a greater level of interaction between the player and the levels. It's more than just a jump'n'run; the user must come up with some strategy in order to get through the levels. Main features: * No installation is required + small download * Sonic-style physics (360° movement engine) * Available in 4 languages: English, Portuguese, Spanish and French * 2 levels + innovative items + extras * You can make your own levels using the embedded level editor * Good performance even on old computers* * There are ports for Dreamcast and AmigaOS 4.x. * Experimental MacOS X support.