DZ (Desolo Zantas)

A large-scale crossover mod for Celeste, built on Everest. DZ blends Celeste's movement and level design with Undertale/Deltarune and Kirby, adding a second playable character, new bosses, custom mechanics, and a full campaign spanning A/B/C/D-Sides plus a DX-Side finale.

Features

• Two playable characters. Play as Madeline (with an optional combat mode) or Kirby (inhale, hover, float jumps, and a combat mode of his own). A player-select screen lets you choose per map, with a recommended-character hint and an auto-select option.
• Full campaign. 19 main chapters (A-Sides) running from Forbidden Metropolis through Core of Existence and Farewell to Stars, each with B-Side and C-Side remixes, plus a DX-Side finale chapter and a True Finale.
• Original bosses. Multiple fully scripted boss fights (including a multi-attack final boss sequence) with telegraphed attacks, enrage phases, and dedicated cutscenes.
• Gentle Breeze Mode. An optional, fully reversible assist bundle for the Kirby player: slow-motion dash aiming and infinite stamina/dashes for players who want a gentler introduction to the movement.
• Last Endemy Mode. Optional online play through CelesteNet, syncing Kirby health and progress between players in the same session, with an in-game rules/consent flow before enabling it.
• Hot Reload tooling. A developer-focused hot-reload system (F5–F8 by default) for iterating on mod code without restarting the game.
• Deep Everest integration. Custom entities, triggers, cutscenes, and UI built on top of CommunalHelper, VivHelper, MaxHelpingHand, FrostHelper, and Extended Variant Mode, with optional support for VidPlayer, BounceHelper, FlaglinesAndSuch, and Deathlink.
• Localization. Dialog is available in English, French, German, Japanese, Korean, Simplified Chinese, and Spanish.

Installation

1. Install Everest for Celeste.
2. Copy this mod folder (or its packaged zip) into your Celeste Mods directory.
3. Launch the game through Everest and enable DZ from the mod list.

Dependencies

Required: EverestCore, CommunalHelper, VivHelper, MaxHelpingHand, FrostHelper, Extended Variant Mode (see everest.yaml for exact versions).

Optional (unlock additional features if installed): VidPlayer, CelesteNet.Client (for Last Endemy online mode), BounceHelper, FlaglinesAndSuch, Deathlink.

Project Layout

• Source/ — mod code: Bosses/, Cutscenes/, Entities/, Mechanics/, Triggers/, UI/, HotReload/, Integration(s)/, and a standalone-engine reference port under Source/DZ/.
• Maps/DZ/ — chapter maps, organized by side (0 = A-Side, 1 = B-Side, 2 = C-Side, 3 = D-Side, 21 = DX-Side/finale).
• Dialog/ — localized dialog files, one per language.
• Graphics/, Audio/, Tutorials/ — art, FMOD audio banks, and tutorial assets.
• Loenn/ — custom entity/trigger plugins for the Lönn map editor.

Contributing / Notes for Developers

• The Hot Reload settings (under the mod's Mod Options menu) let you iterate on Source/ changes live; see _HOTRELOAD_* settings and the F5–F8 bindings.
• Source/DZ/ contains a standalone-engine (non-Celeste) port of several entities for reference/portability experiments — it is not compiled into the shipping mod.
• See CHANGELOG.md for a history of notable fixes and additions.

Credits

Add mod authors, artists, composers, and playtesters here.