The latest bullet hell Cave arcade shooter to get an Xbox 360 port is Ketsui. Already boasting a DS port, the 360 version will offer an exclusive "X-Mode" that allows for lock-on targeting.
Ketsui ~Kizuna Jigokutachi ~ EXTRA is slated for release in Japan on May 28. Developer 5pb will be porting the game — the developer has ported other Cave titles to the Xbox 360 including DoDonPachi Dai Ou Jou Black EXTRA and this month's upcoming release DeathSmiles.
『ケツイ 〜絆地獄たち〜 EXTRA』Xbox 360版オリジナルモードが判明 [Famitsu]