Download the demo!:
https://division6.itch.io/aqua-ippan
https://6th-divisions-den.com/aqua_ippan.html
Aqua Ippan is a passion project paying homage to the very first Metal Slug and reinventing some ideas from its 1995 prototype that were scrapped.
You play as Itou and Yena, two student divers that must flee from a region filled with Vigilanti troops after they've found a mysterious artifact at the bottom of a lake.