A "1-bit" low-fi conversion of MOTHERSHIP: Sci Fi Horror RPG by Tuesday Knight Games. To fully use 1-Bit Mothership you'll need a copy of the original game which is free (although you should buy it, along with the excellent modules).
Coin Flips (1 bit randomizers) rather than dice rolls!
A coin based skill system.
Streamlined and simplified rules.
Designed for maximum compatibility with Mothership modules.