Questing Beast has generously made Maze Rats free due to the Covid quarantines.
Maze Rats is Generously Available for Free
Kreeba
#2
A great system for quick plays, one shots and first timers!
The ‘system’ itself is only 1 page of Rules, 1 page of character creation. Everything else is the best generic fantasy resources you can get and should be in everyone’s quick grab folder.