Carve out your dungeon
Dig through solid rock, shape rooms, and fill your domain with workshops, beds, thrones, altars, and traps.
A small independent game studio, currently making Malignus.
Making the game we want to play.
A 2D dungeon colony sim where you play the villain.
- Free demo on Steam now
- Early Access: November 13, 2026
- Windows PC
- 2–4 player co-op
Official trailer
Build. Expand. Raid. Defend.
Dig out your lair, keep your grumbling minions fed and in line, fill your halls with traps, and raid the world above for treasure, while adventurers fight to take it all back.
The game
You are the Boss. The dungeon is yours.
In many fantasy games, the hero breaks into the dungeon. In Malignus, you rule it: a Boss monster, their minions, and the creatures of the caves.
Command six monster races
Goblins, kobolds, orcs, gnolls, bugbears, and ogres, each with traits, grudges, and breakdowns of their own.
Turn your halls into a deathtrap
Dart throwers, spinning blades, gas, fire, and webs, wired to plates, tripwires, sensors, levers, and timers.
Choose your Boss
Rule as one of four Boss monsters whose powers grow with your treasure hoard.
Raid the world above
Send your minions across the overworld, command every raid in real time, and bring the treasure home.
Rule together
Play alone, or build and manage one shared dungeon in 2–4 player co-op.
Screenshots
Life in the dungeon
Early Access
Play now, grow with us
The free demo is on Steam now. It is also our beta test, and it holds everything in the current game: nothing is locked because it is a demo.
Early Access starts on November 13, 2026. After launch, we plan about one year of monthly updates on a steady schedule, up to the full 1.0 release. Steam Workshop support comes during Early Access.
- Demo
- Free on Steam now
- Early Access
- November 13, 2026 · $19.99
- Updates
- Monthly, for about one year
- Full release
- Version 1.0 · $29.99
- Mods
- Steam Workshop, during Early Access
- Platform
- Windows PC (Steam)
The studio
Three of us, three countries
Mossbomb is based in the US, and the team works from the US, Japan, and Thailand.
Askew
Development and design
Handles most of the development and design of Malignus.
Fezziwig
Business and community
Handles the business side and community outreach.
Khem
Art
Makes all of the art in the game, which gives Malignus its consistent, unified style.
Contact
Say hello
Questions, press, or keys:
Press: the Malignus press kit has screenshots, video, logos, and the fact sheet.