Cave Seriously Has a Guinness World Record For Shooters
Company recognized as having produced most bullet hell shooters.
At today's "Important News From Cave 2011" event, Cave COO Mikio Watanabe said something about Cave having been recognized by Guinness World Records for its prolific development of bullet hell shooting games. I thought he was joking.
According to this listing, Cave really was recognized in October 2010 as being the "most prolific developer of danmaku shooters." "Danmaku" literally means "bullet curtain," but it's more commonly referred to in English as "bullet hell."
The exact number mentioned by Watanabe at today's event, and also listed in the Guinness listing, is 48 danmaku games since DoDonPachi in 1995.