TMNT: Shredder’s Revenge mobile  is free to try up until level 1, so players can see whether they like the game before unlocking the full version. The full game costs €8.99/$8.99, with a special launch discount of 10%! 

Once you've unlocked the full game, you'll have access to all levels, the content of the two DLCs “Dimension Shellshock” and “Radical Reptiles”, and multiplayer mode to play online with your friends!