>>43300335Its basically D&D 1st edition with lots of +1 modifiers and a percentile based skill system.
The Character creation system is the shining jewel but it isn't balanced.
This is off the top of my head:
Basically you start as a animal with a fixed set of Bio-Energy (Bio-E) points. You can gain points by lowering your size level.
So you are a duck (making this up). A normal unmutated duck. You start with 35 Bio-E points (every animal is different).
If you want to be able to talk it will cost you 5 Bio-E for partial Speech (you are harder to understand) or 10 for full human speech
If you want to walk upright it will cost you 5 partial or 10 full.
If you want to look human it will cost you15
if you want to fly with wings it will cost you 10
and so on.
You can trade down size levels Elephant to man sized for example to gain points and also take disadvantages and fucked up mutations and psychosis get more Bio-E points IIRC.
Really small characters could suck in combat but be super smart and stealthy and have all the powers.
You could be a straight animal that isn't bipedal and looks like the animal but is super smart and can talk.
