Since yakuza is covered I'd suggest picking up the pinball arcade seasons 1 and 2, nothing takes itself less seriously than williams pinball tables(shame you can't get addams family anymore) just make sure to get pinball arcade and not zen, they censor all the cheeky bits
Transformers devastation is also great, can't fellow to down when optimus prime is spouting off overly heroic non sense and megatron is cackling like a loony Toon
And staple, earth defense force 5, sure the story (story in edf is like story in adult films, it's there but it doesn't matter) is technically grom, but you'll be too busy punching godzilla in a giant robot to care
Also katmai damacy and bomberman r are good stuff