A cool DBZ game called DBZ Remix Unloaded which was released online last week after 2 years of development.
http://dbzru.mihopa.net/ is the official website to download it
It's one the most amazing dbz games I've played on the pc, and I love its rpg system. So far Im Goku lv 6 in the Saiyan Saga. When you start playing, tell me what your Z-Achievements are.
I forgot to mention that since this is a big game, it will take a while to download. However, once finished you will have the time of your life. Definitly the best dbz rpg pc game EVER!
PS: I just started it a few days ago, so for tips or w/e ask on their forums or something since im still new at it.