S.U.M. - Slay Uncool Monsters
Released Feb 2021
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.
93% positive · 149 reviews
Done
All announced content has been released
Medium confidence
Done
All announced content has been released
Medium confidence
Where to get it
Free on Steam
Evaluation
S.U.M. - Slay Uncool Monsters is a free-to-play math combat game that launched on February 19, 2021. It shipped with six paid DLC characters (Archer, Rogue, Healer, Wizard, Paladin, and Assassin) and a soundtrack — all released on or before launch day. All seven listed DLC items are released, with no unreleased items on the store.
The developer's post history is very sparse: two minor bug fixes shortly after launch (March 2021) and a single feature patch adding a "No Timer" option on December 20, 2023. There are no announcements of upcoming content, no roadmaps, no season passes, and no unreleased DLC listings. The store description references "optional DLC Characters and Worlds," but no additional characters or worlds beyond the six launch DLCs have ever been listed or announced.
With no outstanding content commitments, no sustained post-launch update pattern, and no developer statements indicating future development, the game appears to have launched as a complete package and received only occasional maintenance. The last developer communication was December 20, 2023, and no new content has been signaled since.
Evidence
All six character DLCs (Archer, Rogue, Healer, Wizard, Paladin, Assassin) released on launch day; no unreleased DLC items exist in the store listing
Developer added a 'No Timer' option for Campaign mode — a minor quality-of-life feature patch, the most recent developer communication on record
Content
7 of 7 released · no outstanding content
Media
Details
Developer
Publisher
Doomster Entertainment
Achievements
76
Platform
Windows
Controller
full support
Steam Deck
Verified
Players
Single-player
About this game

In S.U.M. you play as various Heroes in a world filled with Uncool Monsters. Your task is to fight these Monster by using Math. There are plenty of Dungeons that needs to be cleared and they get harder and harder!

Each Dungeon will challenge you with Addition, Subtraction, Multiplication, Division or a combination of those Operators.
A monster will provide you with a sum, your task is to fill the equation with the correct numbers at your disposal.

You'll also perform Special Attacks, depending on your character class, that deals additional damage when setup right. This gives each battle an extra layer of tactics. Plan ahead and you'll beat the toughest of enemies!
Do you think you are up for the challenge? Think twice before heading into the harder Dungeons, they do get tricky!
Are you a beginner with Math? No worries! There's Practice Mode to learn the basics!

The game is Free To Play with optional DLC Characters and Worlds.
"See you in the Dungeons, you vanquisher of the uncool!"
Puts on sunglasses. Rolls off into the sunset on heelys.. ~Doom

Last evaluated Jun 24, 2026
Something about this evaluation looks wrong Report illegal or harmful content