Gunslinger Stratos is an upcoming third-person shooter for Japanese arcades. The Square Enix title features four-on-four online combat that allows players to face off against others across Japan.
It is also dual wielding. Players can take their pistols and conjoin them to form new weapons. Check out gameplay in the above video. More details in Kotaku’s previous coverage.
I was there last week. Game looked really cool if not a little clunky to control. At its core it's just another gundam / dragonball zenkai type game.