Official 358/2 Days collection artwork featuring Roxas, Axel, Xion, Riku and Mickey

An independent fan remake

A familiar journey.
A new chapter.

Rebuilding the journey of 358/2 Days.
Days gameplay. A KH3 foundation.
Faithful by design. Verified through play.

Read the first devlog  ↗Discover the project
Official collection artwork · Not remake footage
In development  /  Foundation & reference researchLatest entry   27 September 2026

Notes from the journey

Development log / 001

The project

The Days you remember.
A new way to return.

We are rebuilding Kingdom Hearts 358/2 Days on the Kingdom Hearts III runtime foundation. Our mandate is clear: preserve Days’ gameplay, missions, panels, progression and encounters while bringing its presentation forward.

Our intended Days launcher will use the player's owned KH3 installation, with separate Days state and an ordinary KH3 launch option. Base KH3 and Re Mind must remain playable.

Movie cutscenes from the collection are also part of the research roadmap, alongside reuse and adaptation of compatible assets.

  1. 01
    Study the original

    Record controlled experiments. Measure behavior before deciding how to reproduce it.

  2. 02
    Build the foundation

    Reliable entry, menus, player systems and separate save ownership.

  3. 03
    Finish one complete mission

    Connect combat, objectives, rewards and persistence before expanding content.

  4. 04
    Grow, compare, refine

    Bring the campaign together and test the full journey from a clean save.

Faithfulness, measured.

Our 1:1 gameplay target

The original Days is our specification. Our goal is to preserve its rules, missions and progression within a modern presentation. This standard guides implementation, testing and every decision about the remake.

Study

Every rule has a reference

Movement, combo timing, magic, Limit Breaks, damage and boss patterns. Panel placement, links and statistics. Mission objectives, spawns, rewards and room layouts. We study the original directly and record what it does.

Compare

The same scenario, twice

Repeat recorded inputs from controlled states, then test the equivalent scenario in the remake. Compare timing, movement, damage and mission state. Correct discrepancies and rerun earlier checks. Reference experiments are underway; full paired gameplay coverage remains ahead.

Verify

The entire journey must work

First, one complete mission. Then a clean-save playthrough through the campaign, checking unlocks, bosses, transitions and saves after restarting. Document intentional presentation changes and every unresolved gameplay difference.

Read our fidelity and testing approach ↗

Where we are

As of 27 September 2026
Demonstrated

Engineering foundations

A diagnostic widget displayed inside KH3. Bounded Roxas and test-map experiments. Repeatable original-game menu and movement observations.

Being built

The Days front end

Menu navigation is implemented. Current integration focuses on artwork, controller input, game entry and separate save routing, followed by in-game verification.

Still ahead

Campaign production

The next production gate is a complete, tested mission. Panel systems, combat fidelity and campaign content follow the dependency roadmap, with a full playthrough required before release.