PolyAlien
A One-Page TTRPG of Cosmic Infiltration
PolyAlien is a free rules-light one-page TTRPG about aliens in humansuits infiltrating Earth, built for quick one-shots, TTRPG jams, and low-prep play.
Why Play PolyAlien?
PolyAlien is built for immediate fun: fast character setup, absurd alien-human tension, and a clear gameplay loop for 60 to 120 minute sessions. It is ideal for conventions, game jams, and groups that want narrative TTRPG play without heavy rules overhead.
How Does a Session Work?
A session starts with ultra-fast alien setup: two stats, one signature move, and a shared mission. The group then infiltrates human scenes, improvises social chaos, and handles suit glitches that push the story into weird directions. The GM can improvise quickly using the built-in prompts and tables.
PolyAlien is designed for groups that want to play immediately without heavy prep. It fits short weeknight sessions, convention demos, online one-shots, and design jams. You can run complete stories with minimal setup while still getting memorable character moments, escalating stakes, and satisfying session endings.
FAQ
How many players can play PolyAlien?
PolyAlien works best with 2 to 6 players including one Game Master for quick one-shot sessions.
What dice are required?
You can play with common polyhedral dice: d4, d6, d8, d10, d12, and d20.
How long does a session take?
Most sessions run from 60 to 120 minutes depending on your human quota.