Ratatan episodes unfold across four distinct worlds, each one a separate chapter in the larger story of the Ratatan trying to escape the World of Redo and reach the Everafter. If you want to see the true ending, the path runs straight through all four Ratatan episodes in order, with no skips or shortcuts. This guide walks through every world, what unlocks which, and how the final chapter fits into the post-game loop after the 1.0 release.
The Ratatan Episodes at a Glance
The full campaign splits into four Ratatan episodes that map onto four separate worlds. Each world introduces a new biome, a new boss track, and a fresh batch of Cobun recruits, while the story continually pushes the Ratatan further along the road toward the Everafter. Players who only finish the first world will see a partial ending, but the true conclusion is locked behind the later episodes.
| Episode | World | Main Biome | Approx. Clear Time | Story Milestone |
|---|---|---|---|---|
| Episode 1 | World 1 | Tutorial Coast | 3-5 hours | First march, Cobun recruitment opens |
| Episode 2 | World 2 | Sandsea Dunes | 5-7 hours | God-Beat conductor appears, oath system widens |
| Episode 3 | World 3 | Crystal Reaches | 6-8 hours | Dark Ratatan encounters begin, the Everafter is named |
| Episode 4 | World 4 | The Redo | 4-6 hours | Final boss, true ending, New Game Plus unlock |
That pacing comes from community data compiled after the 1.0 launch and tracks closely with what most solo players report. Co-op sessions tend to finish each world a little faster because the rhythm commands stay tighter with four players. If you want a more detailed breakdown of every biome and story beat across these four Ratatan episodes, the longer plot summary hub goes beat by beat through the World of Redo arc.
World 1: The Opening March (Episode 1)
The first of the Ratatan episodes is also the most forgiving. World 1 drops you onto the Tutorial Coast with a small drum squad, four opening heroes, and a steady stream of low-stakes encounters designed to teach the rhythm-command loop. Most of what you do here feels like training, because the story has not yet started pulling in any direction.
What Unlocks in Episode 1
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First Cobun recruitment: the Support Desk fills up as you clear stages, and followers like the Wandering Snail and the Chirpy Sparrow join automatically.
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Melodium crafting basics: the basic gear loop is open, and you can start upgrading weapons and shields at the Ratatan Dock.
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Boss track #1: the Sandsea Sentinel waits at the end of the world, a teaching boss that introduces the four-beat command cycle.
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New Game foundations: the save system, oath meter, and rhythm calibration all finalize here.
Episode 1 ends with a short cutscene that sets up the rest of the Ratatan episodes, and the Sandsea Sentinel drops a small set of mythic-tier materials that power the first Melodium upgrades. Once you step through the portal at the end of World 1, the world map opens and Episode 2 becomes available immediately.
World 2: The Sandsea and the Conductor (Episode 2)
The second of the Ratatan episodes moves the march inland to the Sandsea Dunes and raises the difficulty curve in a noticeable way. Sandstorm hazards, multi-phase boss tracks, and the first appearance of the God-Beat Conductor make World 2 the first real skill check. The conductor is not the final boss of this world, but he is the figure who keeps showing up in the margins of every later world, and the story begins treating him as the central antagonist of the entire campaign.
What Unlocks in Episode 2
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Oath system widening: more oath paths open, including the harder Welcome Mode and oath-gated difficulty routes.
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Cobun roster expansion: new followers from the Sandsea join the Support Desk, expanding the command vocabulary.
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Mid-game mythic weapons: weapon tiers 3-4 become craftable, and the Sandsea-exclusive mythic track opens.
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Post-game flags: finishing the world sets the internal flag that lets the Dark Ratatan encounters appear in World 3.
If you want a precise walkthrough of the World 2 unlock conditions and how Welcome Mode changes the difficulty curve, the difficulty and oath guide lays out the exact settings. Episode 2 is also the first place where pacing choices start to matter, because spending too long on side content here can leave your mythic weapon upgrades behind the difficulty curve by the time you reach World 3.
World 3: The Crystal Reaches and the Dark Ratatan (Episode 3)
The third of the Ratatan episodes is the longest and the densest. The Crystal Reaches biome introduces environmental hazards that interact with the rhythm layer, and the Dark Ratatan encounters start showing up as optional bosses layered over the regular track list. World 3 is where the campaign stops being a march and starts being a war, because the Conductor reappears more aggressively, and the story reframes the World of Redo as a place the Ratatan have been trapped in before.
What Episode 3 Unlocks
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Dark Ratatan encounter chain: a parallel boss track with reworked patterns and unique mythic drops.
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Late-game crafting tiers: weapon tiers 5-6, including mythic weapons gated by specific Dark Ratatan clears.
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Everafter lore drops: the story names the destination of the march for the first time and explains what reaching it actually means.
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New Game Plus flags: the save file is flagged as Episode 3-complete, which is required before Episode 4 will trigger.
Players who only clear the main World 3 track without engaging the Dark Ratatan chain will still see the standard ending, but the post-game loop is noticeably thinner. According to community testing, about 60% of the strongest mythic weapons require at least one Dark Ratatan clear to unlock, so the optional content here is mechanically meaningful, not just cosmetic.
World 4: The Redo and the True Ending (Episode 4)
The fourth of the Ratatan episodes is the final chapter, and it is the one most players either stumble into or lock themselves out of by accident. Episode 4 is not a regular world on the map. It is a hidden chapter that only triggers after you have cleared Episode 3, defeated the Dark Ratatan final boss, and met a few additional oath and support-desk conditions. If those conditions are not met, the game simply rolls credits and offers the New Game Plus path instead.
According to the official Ratatan Steam News announcement, the Early Access launch delivers the first batch of story-driven chapters that make up the opening arc of Ratatan Episodes.
The Unlock Conditions for Episode 4
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Clear the main track of World 3.
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Defeat the Dark Ratatan Conductor at the end of the Dark Ratatan chain.
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Reach Oath Level 5 with at least one oath path.
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Have the Support Desk at tier 3 with 8+ Cobun followers unlocked.
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Have no active game-over state in the current save file (the trigger checks your clean-run flag).
The full list and the common pitfalls that block the trigger are covered in the Episode 4 unlock walkthrough. The short version is that Episode 4 is a clean-run reward: if you skipped the Dark Ratatan chain or never pushed your oath level, the game treats your run as the standard ending and the final chapter does not appear.
What Happens in Episode 4
Episode 4 takes place in a warped version of the World of Redo called the Redo proper, with remixed versions of boss tracks from all four Ratatan episodes and a final confrontation with the God-Beat Conductor in his canonical form. The true ending plays after the final boss, and the save file is then flagged for New Game Plus, which carries over mythic weapons, oath progress, and Cobun unlocks while ramping up enemy health and pattern speed. The pacing of this final episode is tight, and most players report a 4-6 hour clear on a fresh save.
How the Four Episodes Connect to New Game Plus
The post-game loop after the true ending is built directly on top of the four Ratatan episodes. New Game Plus replays the same four worlds with stronger enemies, new mythic drop tables, and access to the additional oath paths that were locked during the first run. Players who finish all four episodes on the highest New Game Plus tier unlock the Everafter Hub, a small side area that does not extend the main story but acts as a museum and a sandbox for testing late-game builds.
| New Game Plus Tier | What Carries Over | What Changes | Approx. Run Time |
|---|---|---|---|
| NG+1 | Mythic weapons, Cobun roster, oath progress | +20% enemy HP, faster pattern timings | 12-15 hours |
| NG+2 | All of the above + Melodium upgrades | +40% enemy HP, new enemy variants | 14-18 hours |
| NG+3 | All of the above + Everafter Hub access | +60% enemy HP, Dark Ratatan patterns unlocked in main worlds | 16-20 hours |
The full breakdown of the post-game loop and the practical tips for moving through it efficiently sit in the post-game and NG+ guide. For most players, NG+1 is where the build-crafting side of the game opens up, and the later tiers are where the rhythm-command optimization really matters.
Why the Episode Order Matters for the Story
The four Ratatan episodes are not interchangeable chapters. They are paced as a single rising arc, and the story does not rescale if you skip ahead. Episode 1 sets the tone, Episode 2 introduces the antagonist, Episode 3 reframes the world, and Episode 4 closes the loop. Players who try to rush straight to Episode 4 by any means will see the trigger fail because the narrative flags and the difficulty checks both depend on the prior episodes.
| Episode | Narrative Role in the Rising Arc | Difficulty Check Trigger | Narrative Flag Dependency | Risk of Skipping Ahead |
|---|---|---|---|---|
| Episode 1 (Tutorial Coast) | Sets the tone; introduces the Ratatan and the Melodium command layer | None — baseline calibration | None — establishes root flags | Lose all later trigger context |
| Episode 2 (Sandsea) | Introduces the Conductor antagonist; slow-burn escalation | Step-1 escalation check | Requires Episode 1 cleared | Mythic drop-rate bonus not applied |
| Episode 3 (Crystal Reaches) | Reframes the world; the 8 Dark Ratatan are assembled here | Step-2 war-tier check | Requires Episode 1 + 2 cleared; Mythic limit-break material gates open | Goddess Games reward chain locked |
| Episode 4 (The Redo) | Closes the loop; oath and support-desk conditions both gate the true ending | Step-3 final check (oath + support-desk) | Requires Episode 1–3 cleared, Dark Ratatan chain complete | True ending trigger fails; no rescaling |
That structure also explains why the worlds feel so different. The Tutorial Coast is a teaching ground, the Sandsea is a slow-burn escalation, the Crystal Reaches is a war, and the Redo is a release. If you are planning a first playthrough and want the smoothest path to the true ending, the recommended route is simple: clear Episode 1, push through Episode 2, finish the main track in Episode 3, clear the Dark Ratatan chain, then trigger Episode 4 by meeting the oath and support-desk conditions. Anything else either locks you out of the true ending or pushes the difficulty curve ahead of your mythic weapon upgrades.
Frequently Asked Questions
How many Ratatan episodes are there in total?
There are four Ratatan episodes in the campaign, each tied to a separate world. Episode 1 is the Tutorial Coast, Episode 2 is the Sandsea Dunes, Episode 3 is the Crystal Reaches, and Episode 4 is the final chapter in the Redo. The true ending only plays after all four are cleared in order.
What is the fastest route to the true ending?
Clear Episodes 1 through 3 on the main track, defeat the Dark Ratatan Conductor at the end of the optional chain, reach Oath Level 5, and upgrade the Support Desk to tier 3. With those four conditions met, Episode 4 will trigger automatically and the true ending will play after the final boss.
Can you skip an episode and still see the true ending?
No. The four Ratatan episodes are gated sequentially, and the Episode 4 trigger checks your clear state for all three prior worlds. Skipping ahead via New Game Plus still requires a full clear of each world on the active save file, so the true ending stays locked until you finish them in order.
Do mythic weapons carry over between episodes?
Yes. Mythic weapons, Cobun unlocks, and Melodium upgrades persist across all four Ratatan episodes within a single playthrough. They also carry into New Game Plus, which is the main reason the post-game loop remains worth running even after the true ending has played.