So you have to complete the game 13 times to get them all. It may have 21 characters, but 13 of them are hidden. It may just be that it doesn't compare favourably with arcade games) (The following rampant criticism is based on the PSX version. How can anybody like this game? Ok, stupid question, lots and lots of people do like this game, the sales figures (not to mention the previous two writeups) say it all.