Due to popular demand, we've added the complete remixed soundtracks (by DM Ashura and Woofle) and original soundtracks for all three games in the Gundemonium Collection (Gundemonium Recollection, GundeadliGne and Hitogata Happa) in celebration of the Steam Summer Sale. That's a total of 75 tracks, counting some new bonus tracks! The soundtracks are also available to those who have previously purchased the games, so no one will be left out.

After downloading or updating any Gundemonium Collection game, you can access its songs in the "Soundtrack" subfolder, inside of the game's install folder.

Gundemonium Collection
-Improved gamepad support.
-Added an INI setting for Steam overlay pop-up position.
-Fixed INI settings related to refresh rate.
-Fixed a minor bug with the Friends display mode in leaderboards.

Gundemonium Recollection
-Fixed a small display error in the Ain Soph Aur leaderboards.
-Fixed a small display issue with certain weapons in Holiday colors.

GundeadliGne
-Majorly overhauled Online Duet, eliminating a large amount of past issues.
-Added ability to create invite-only lobbies in Online Duet.
-Added ability to use Holiday colors in Online Duet.
-Added distinction between overheat sounds when both players use Eryth.
-Added an overheat cooldown display when Eryth is overheated.
-Changed Steam overlay pop-up to appear in the bottom-left by default.
-Fixed some issues with the non-Friends lobby list.
-Fixed some bugs related to Eternal Babel mode line count.
-Fixed a small bug when restarting from the pause menu.
-Fixed a bug that could cause replays desyncs. Only new replays are fixed.
-Fixed a bug allowing invalid input settings, causing issues in some menus.
-Fixed a bug in Duet Play Chapter 4 when one player runs out of lives.

Hitogata Happa
-Added subtitles to voices that previously lacked text.
-Added an INI setting for toggling subtitle display.
-Changed Steam overlay pop-up to appear in the top-left by default.

Gundemonium Collection
-Added new holiday achievements.
-Added new holiday outfit color sets.
-Plus a couple other surprises!

GundeadliGne
-Made some small networking improvements.

-Fixed a case of mistaken censorship in stage 2.
-Added player count to Online Duet menu.
-Added optional distance filtering to Online Duet lobby searches.
-Improved Online Duet lagspikes somewhat. Further improvement pending.

Gundemonium Collection
-Fixed a typo in the game copyrights.
-Added basic resizing to windowed mode.
-Added screen size options to the INI files.

Gundemonium Recollection
-Fixed a minor issue with the Sound Test.

GundeadliGne
-Fixed another bug with Nagi's Relics.
-Fixed an issue with slow movement during rapid-fire.
-Fixed a small bug related to localizations.

Hitogata Happa
-Fixed a bug where the True Last Boss would appear suddenly.
-Fixed the Destructive achievement.
-Updated the game with more recent balance changes.
-Most dolls now have different bomb sizes.
-Fortuner's Fortune Wheel has been adjusted.
-Earl's Flow will now charge more quickly.
-Sikkim's Panzer Knuckle damage has been reduced.
-Rooty's Drill Cannon piercing ability has been reduced.
-Old replays can be viewed without any problems despite these changes.
-Unfortunately, due to these changes, several leaderboards will be reset for fairness.
-Affected leaderboards: Main Game, Clover, Rooty, Assam, Dimbula, Sikkim, Peco, Fortuner, Fool, and Destiny 13.

GundeadliGne
-Fixed issues with Eternal Babel. Existing scores will be reset.
-Fixed a bug with Nagi's Relics when changing stages.
-Fixed a small leaderboard scrolling bug.

Gundemonium Collection
-Fixed various leaderboard bugs.
-Fixed an unusual leaderboard exploit.
-Fixed a case where a blank score could be uploaded to the leaderboards.

Gundemonium Recollection
-Fixed an issue with custom keyboard configuration.
-Changed button configuration to allow easier separation of the Slow and Shoot buttons.

GundeadliGne
-Fixed an issue where Nagi's Relics would behave strangely after continuing.
-Made some slight stability updates to online play.

Hitogata Happa
-Fixed an issue with custom keyboard configuration.