Compete in over 150 unique missions around 30 intense action filled stages, there’s also a two-player cross kart racing mode and some other competitive modes for when you get too focused with the main story and want something a little less impactful! Sonic Adventure 2 is an action platformer developed by SEGA. Sonic Adventure 2 Steam Key EUROPE Choose your side, whether you’ll support good or evil is for you to decide!.