YAOSC (Yet Another Old School Clone)
The art of hitting things. Very hard. With your body.
1: Your unarmed attacks do 1d3 minor damage or 1 major damage1, as you desire.
2: Your unarmed attacks do 1d6 minor damage or 1d3 major damage.
3: Your unarmed attacks do 1d6 minor or major damage.
4: As (3), and critical hits stun the opponent for 1 round.
6: As (4), and you can attack hard inanimate objects without harming yourself.
8: As (6), and you can parry melee weapons with your bare hands!
10: As (8), attack rolls of 18 or higher stun for 1 round if they hit, and critical hits break one of of the opponent’s bones, pieces of armor, shield, or weapon at the YAM’s discretion. Misses may damage scenery.