Robots compete by gathering junk in this crazy battle! The rules are simple! Use blocks and crush your foes! Play with up to 4 players! On Planet Scrap, robots compete by gathering junk in this crazy battle! The rules are very simple yet very addictive.. You can play solo or in up to 4 player mode on local multiplayer. Choose solo play or coop with friends to beat stages on Challenge Mode. If you want to absorb the game deeply solo, try Scrush mode to test your crush action skills. Unlock items such as the gimmick block and the game will be even more fun!