I've found a fun little flash game. You randomly generate a fighter character and pit them against others. You get weapons, animals, abilities and upgrades as you level up. The fights are based on your and your foe's stats/abilities but of course have a random element to them too.

If you would like to try it out, go to this link to create a character to fight my character:
http://dreadnz.mybrute.com

Post links to your characters so others may challenge you.