Had potential, but there are no real upgrades, just new arms, and the fighting consists of rock paper scissors with stats and has little to no strategy involved. Very simple and uninteresting.
The upgrades extend to you KO a robot, you get their arm. The combat is simple and random and can usually be won by selecting on kind of punch for the duration of the fight. The only variation from fight to fight is which punch to choose. Had potential but was way to simple to hold my attention.