Susume Tactics was originally released as a downloadable game for PSP. Developed by Japan-based Riz Inc., the retro-styled real-time strategy game is now available for iOS and Android devices as well.
In Susume Tactics, you build and command an army of tanks to defend your mothership while destroying waves of enemy units that get stronger and stronger. You have 11 types of tanks to choose from, and the game includes multiple difficulty levels.
Susume Tactics costs $3.99 / €3.99 / £2.99 on smart devices.