Costumes Guide — Every Costume & How to Unlock Them

How Costumes Work

Costumes in Sephiria are cosmetic — they change your rabbit warrior's appearance in runs and in co-op lobbies. There are 20+ costumes available at 1.0.

• Costumes are account-wide: once unlocked, they can be equipped from the character customization menu on any save.
• They are earned through gameplay, not purchases — story progress, challenge milestones, and achievements unlock them.
• Cosmetics have no gameplay effect — a costume never changes your stats or run.

How Costume Unlocks Work

Costumes unlock through the game's normal progression systems. The unlock categories:

Unlock Category	How You Earn It	Examples
---	---	---
Story progress	Defeating chapter bosses while climbing	One per major boss defeat
Run milestones	Full clears, no-death climbs, speed achievements	Beat the game's ending
Challenge modes	Hard Mode and Gauntlet Mode milestones	The prestige cosmetics
Achievements	The 27-achievement roster rewards several costumes	Grindy but deterministic
Co-op milestones	Wins with a party	Rewards team play

Because the exact unlock lists are spread across the game's achievement screen, the reliable way to plan your grind is:

1. Open the achievement screen — every achievement that rewards a costume lists its unlock condition.
2. Pick your target — the hardest-to-earn costumes come from Hard Mode and the endgame challenge modes.
3. Check the character menu — costumes you haven't earned yet show their unlock hint.

Which Costumes Are Worth Grinding?

• Best flex: the Hard Mode completion costume — no RNG, pure skill, and most players never see it.
• Best story rewards: the chapter-completion costumes — every full climb earns one.
• Best for co-op: the co-op milestone costume — recognizable at a glance in lobbies.
• Best bragging rights: the endgame challenge costumes — they show you cleared the hardest content.

If you only care about one, go for the Hard Mode completion costume: it's the community's most respected cosmetic.

Costume FAQ

Do costumes affect gameplay? No — they are purely cosmetic. Can I preview costumes before unlocking? Yes — the character customization menu previews every costume, locked or not. Do I need to re-earn costumes on new saves? No — costumes are account-wide once unlocked. Are costumes ever pay-only? At 1.0, costumes are earned through gameplay. If that changes, the official Steam page will say so.

Related Guides

• Full Release Guide — All 1.0 content and unlocks
• Hard Mode Guide — How to earn the prestige costume
• Endgame Guide — The grind behind the challenge costumes
• Chapter Guide — Story-progress costume routes