Burning Rival and Arabian Fight would be next most obscure games I'd guess.
The obscure trio ran on the System32 board...
Another obscure AM2 game is a Golf game, according to the current second AM2 manager (Noriyuki Shimoda:
https://www.linkedin.com/pub/noriyuki-shimoda/36/463/b76). BTW this guy only joined in 2004 and got to produce several important Sega titles already...
Resume:
produced original title:
BORDER BREAK(ARCADE)
AFTER BURNER CLIMAX(ARCADE/XBLA/PSN)
GHOST SQUAD(ARCADE)
SEGA GOLF CLUB(ARCADE)
produced conversion title:
VIRTUA FIGHTER5(Xbox 360/PS3)
VIRTUAL-ON FORCE(Xbox 360)
VIRTUAL-ON ORATORIO TANGRAM(Xbox 360)
DAYTONA USA(Xbox 360/PS3)
VIRTUA FIGHTER2(Xbox 360/PS3)
FIGHTING VIPERS(Xbox 360/PS3)
SONIC THE FIGHTERS(Xbox 360/PS3)
SEGA Golf Club is actually this game and got a PS3 port:
https://www.youtube.com/watch?v=OvnCnurG4fIThen there is also this baseball card game which get's mentioned on R&D2 hiring sites:
https://www.youtube.com/watch?v=c919Q0ypHZkHowever it seems that Crazy Taxi creator has favoruited this game on his Facebook:
https://www.facebook.com/kenji.kanno.5Meaning that's it is not necesarily a AM2, but rather made under Mie Kumagais teams...(AM3)
BTW Sega people are seemingly friends with other Sega people at Facebook...