Killer Instinct Classic

This was one of the last achievements I needed, to speed things up I put the difficulty on the highest setting in the options, then progressed up until tj combo who was the 3rd or 4th opponent for me (it's important he is not the first one since he won't kill you as fast...) it doesn't have to be tj combo I just found he kicked my butt really good :)

I just keep walking towards him with the intent of taking a severe beating and occasionally medium punch him to try to stop you getting dazed, I also used fulgore who's special move ( hold back for 2 seconds then press forward + medium kick ) placed me right infront him pretty well, thus speeding up the beating further when you get knocked down/between rounds etc...

Alternatively you can just make it as far as you can on extra hard difficulty. Then just rubber band down the A button and it will automatically use credits and select the character etc... Every 10 minutes you should just move around a little. Probably takes about 2 hours like this from 0-400 credits.