Rockin' Android might have already released its Gundemonium Collection to PSN and Windows, but the boutique publisher is now bringing the doujin shoot'em up anthology (includes Gundemonium Recollection, GundeadliGne, and Hitogata Happa) to Steam with several additions.

The biggest change is that GundeadliGne now has online co-op (PSN version was local-only)! Rockin' Android has also dropped in Steam Achievements, and brand new music arrangements from DM Ashura and Woofle designed to "get your heart pumping and multiply the intensity".

What's more, a Rockin' Android says that if this sells well on Steam, it will consider putting more of its titles on the platform (possibly with more new features?) -- I'm hoping for the Suguri games! You'll be able to grab Gundemonium Collection from Steam some time next month.