It's a low power alternate WW2 RPG. A character might have super-strength, but can still be killed by a bullet - or he might be able to jump 20 miles.... but only 20 miles (thus every time he jumps, he goes 20 miles). They also can resist each other's powers in a way.
See
this for some introductory information!
It was actually supported pretty well. Out of it grew the superhero game 'Wild Talents' from the same world, just later in time.. Both games use ORE (the One Roll Engine).