How to use it
Pick a room type, then click or drag across the grid. Each cell is one planning block, not an in-game tile. Use the eraser or right-click to clear a cell. The plan is a sketch of relationships, not a tile-accurate copy of the game.
- Start with the entrance and the kill corridor. Paint the Stair Vault at the edge, a Corridor, then a Trap run.
- Put the Great Hall behind the trap run. Add the kitchen, quarters and storage around it, not in front of it.
- Place the Sanctum deep. Give the boss a short route to the Great Hall but keep the hoard behind the defense.
- Add the Cell Block, shrine and lair once the core works.
- Save, export or print the plan. Saving stores it in this browser only.
Great Hall — Social and defense core. Official room name.
Click or drag to paint
Mouse: click or drag to paint; right-click to clear. Keyboard: focus the grid, use arrow keys, Enter or Space to paint, Delete to clear. Touch: tap a cell, and swipe sideways to pan the plan.
0 cells painted
Cells by room type
Room legend
Great Hall GH
Social and defense core. Official room name.
Kitchen K
Cooking table, food storage and dining access. Official room name.
Quarters Q
Beds, lockboxes and personal space. Official room name.
Storage ST
Filtered shelves for food, materials and gear. Official build category.
Workshop WS
Crafting bench, forge and gear production. Official build category.
Cell Block CB
Prisoners and interrogation. Official room name.
Sanctum SA
Throne, hoard and boss. Official room name.
Shrine SH
Altar and worship cluster. Keep within 5 tiles in the same room.
Lair LA
Creature habitat. Ember Pit and Cairn are confirmed types.
Stair Vault SV
Entrance and stair structure. Official area name.
Corridor CO
Circulation. Use a planning label, not an in-game room name.
Trap run TR
The kill zone. A planning label, not a confirmed room type.
What it does not do
- It does not import or export an in-game save.
- It does not know room sizes, build costs, pathfinding or trap ranges.
- It does not validate that your layout is buildable in Malignus.
- It does not send your plan to a server. Saved plans stay in this browser's local storage.
Use the sketch to ask better questions
The planner is most useful before you open the game: where does the enemy path cross the worker path? Is the kitchen reachable without walking through the trap run? Can the boss reach the Great Hall without leaving the hoard? Take the answers into the build, then adapt to the actual grid.
Sources
Sources for this page
- 01Official Malignus interface screenshots — Mossbomb
The press kit's 'Screenshots with the interface' set documents the New Dungeon flow, boss select, minion stats, duties, grumbles, behavior settings, trap build menu, wiring, Dark Arts, boss upgrades, prisoners, altar and overworld map. Used for observations that are not spelled out in the store copy.
- 02Malignus press kit and fact sheet — Mossbomb
Fact sheet, development history, feature list, character and creature art, screenshot captions, and permission for press and content creators to use the kit's media in coverage of Malignus.
- 03Malignus on Steam — Valve / Mossbomb
Store description, Early Access Q&A, tags, supported languages, features, system requirements and the storefront's November 12, 2026 date display.
Accessed 1 November 2026. Full source log and verification notes: Malignus Wiki sources.