MUTANANNY Playtest
A downloadable game
MUTANANNY is a gonzo swamp-apocalyptic role-playing game (RPG) where you and your friends play as degenerate garbage-dwelling mutants just trying to make it through their next awful day. Trade scavenged goods, forge social bonds with other hideous weirdos, struggle to survive the swamps, and deal with ravenous moon humans dropping back down to take back their world.
Distinctive Features
The post-apocalyptic genre is a crowded one. To help decide if this game is the right way to express the yearning for ruin lying within you, here are a few ways this game stands apart from the rest:
- Soggy Apocalypse: Human civilization ended primarily due to the slow-motion disaster of climate change. This game takes place in the swamps and marshes of Delmarva on the eastern shore of what was once the United States.
- No Humans Allowed: you will not be playing as human survivors. Instead, you are the monsters that took their place. Mutants: hideous human offshoots hardy enough to stave off rampant disease and pollution.
- Mundane Mutation: Every Mutant is marked by miscellaneous Mutations upon maturation. While these often stray far from plausibility, these are still physical changes. Psychic or magical abilities are nonexistent or mere con artistry.
- Off-Road Motor Mayhem: huge gas guzzlers would only get stuck in the mud. Only off-road vehicles, swamp boats, or beating feet get you anywhere. The sea is nigh-impassible, crawling with monstrous crabs that can pry a boat apart in minutes.
The current fully playable playtest version of MUTANANNY is 129+ pages in 6” x 9” trade book format. This game runs on METTLE Core, a hybrid dice pool system that prompts for dramatic twists on failed rolls. Sections include an introduction, character creation, engine (system basics), scenes and actions, resources, setting details, and guidance.
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| Updated | 18 days ago |
| Status | In development |
| Category | Physical game |
| Rating | Rated 5.0 out of 5 stars (2 total ratings) |
| Author | Planarian |
| Tags | mutants, Post-apocalyptic, Tabletop role-playing game |
| Content | No generative AI was used |
Download
Click download now to get access to the following files:
Development log
- MUTANANNY Playtest version 20!18 days ago
- MUTANANNY Playtest version 19!Apr 25, 2026
- MUTANANNY mutates further!Mar 22, 2026
- MUTANANNY Bounces BackDec 01, 2025
- MUTANANNY Playtest Update 1.1!Sep 28, 2025
- MUTANANNY Playtest version 1.0!Sep 02, 2025
- MUTANANNY Version 0.9!Aug 10, 2025
- MUTANANNY Playtest v 0.8 Update!Jul 28, 2025




