Dungeon Defenders

To do this, you need to reach Wave 20 in survival mode (any map) on at least Medium difficulty. Recommended levels to do this are The Deeper Wells, Magus Quarters or Alchemical Laboratory. Set up your defenses as per normal and kill the monsters as they appear. You can start at higher waves (Wave 8 being the highest) so you don’t have to sit through the earlier waves.

We recommend that you play this entirely offline (signed out from PSN) and only when you have at least 6-8 hrs+ to spare, as many people have reported that the game freezes on later waves when the amount of monsters exceed 5000.

A majority of the community believe that the game freezes because it can not keep up with your Kills Ticker on the bottom right of your screen (a Ticker appears whenever your Hero or Defenses kill a monster). To mitigate the freezing effect, either leave your PS3 idle during the build phase until all Tickers disappear, or see this post for advice..