While Rockin’ Android’s Gundemonium Collection will soon be available as a digital download on PlayStation Network, you can also go out and buy yourself a physical copy if you’re so inclined. The collection contains Gundemonium Recollection, GundeadliGne, and Hitogata Happa, all for $19.99 on a single CD, and they come with both English and Japanese language text.
All three games are developed by Platine Dispositif. You can grab the collection here.
Thanks, as always, to Denpa no Sekai for the tip!