For those who don't already know, the description for how to get comeback victories mentioned above is incorrect. The life point difference doesn't matter. You just need to have lower life points at the start of the turn that you defeat the opponent.
The issue people have is that they increase their lp or lower the opponents lp so that theirs is higher but don't beat the opponent before the turn ends.
Well I can definitely confirm that this is the case. As long as your LP was lower than your opponent's when the Turn starts & Win that turn, Comeback Bonus (2500 btw) triggers. I will never be able to pull this or Low LP bonus (which likely runs on the same principle) w/ my Cerberus/Spirit deck. ;;~;; ce'la vi