Play Enter the Gungeon as Marble Blast Gold's rainbow marble. You can't be hurt: bullets, traps and contact do nothing. Instead you ram the Gundead. A real hit kills a Bullet Kin outright and a Shotgun Kin in two, and bosses take a pounding.
Marble Blast physics on the Gungeoneer's body: momentum, bounces off walls, and a jump on the Dodge Roll button.
Gems are your ammo: they replace blanks on the HUD, two lie in every room, and Shoot fires them, each hitting as hard as a full-speed ram.
Marble Blast power-ups replace what chests and drops would give: Super Speed, Super Jump, Super Bounce, Shock Absorber, Gyrocopter and Time Travel (slows the Gungeon). Keys and shell casings stay, so chests and shops still work.
Mines and bumpers in combat and boss rooms, and they hit the Gundead too.
Pits just drop you back on safe floor right beside where you fell; pits that lead to the next floor still work.
Marble Blast's HUD and sounds: the timer, power-up box, gem counter and every bounce, boom and voice line.
Marble Blast Gold's models, HUD images and sounds come from your own installed copy, so you need Marble Blast Gold as well as Enter the Gungeon. Single player.
Controls
Move roll · Dodge Roll jump · Shoot fire a gem · Use Item fire the power-up · Interact as usual
Good to know
Marble Blast Gold is found in its usual install folders on any drive. If yours is elsewhere, put its folder on the first line of BepInEx/config/marbleblastgungeon.txt.
Credits
Enter the Gungeon by Dodge Roll / Devolver Digital.
Marble Blast Gold by GarageGames / Monster Studios (published by RealNetworks): every model, texture, particle, image and sound, read from your own copy; none of its files are included.
Marble Blast Web by Vanilagy (MIT): DTS model layout and engine values.
Runs on BepInEx 5 with HarmonyX, installed by Melty.