S.U.M. - Slay Uncool Monsters is a Education, Free to Play, Logic PC game, developed by Doomster Entertainment, available on Steam and published by Doomster Entertainment.
In S.U.M. you'll put your Quick-Math skills to test! Fight very Uncool Monsters using Addition, Subtraction, Multiplication & Division. Level up and progress in the Campaign(s), or show your prowess in Endless Mode with Leaderboards.