GURPS
GURPS is my roleplaying game mechanics system of choice. You can do what ever you want with GURPS: Sci-Fi, Fantasy, Cyberpunk, what ever you like. Also, as you're using only one system for all games, you don't have to learn new rules every time you start a new campaign in a new setting.
GURPS Campaigns
- Wanderers of the Great Desert [Status - Stasis]
- Patrolling Infinity [Status - Concept]