Sephiria Co-Op Guide: Four-Player Multiplayer, Trading, and Revives
This sephiria co op guide explains how to set up four-player Steam multiplayer, trade items, revive teammates, and keep personal unlocks.
What Co-op Supports
Sephiria supports online multiplayer through Steam for up to four players, and the design assumes a shared descent: teammates can trade items with each other, fallen teammates can be revived, and the tower is the same secret-riddled place it is solo. The game also runs on Steam Deck, and unlocks you earn while playing with others apply to your own profile. In short, co-op is not a bolted-on afterthought — it is a full way to play the game, and for many players the preferred one. At a $14.99 price point it is also one of the cheaper four-player co-op buys on Steam, which is why the session-finding channels stay busy.
This guide covers how to set up a session, how progress and unlocks work per player, how trading and revives function, and the party habits that keep four bunnies alive on the way down to save Bunnyville.
Setting Up a Four-Player Session
The session flows through Steam. One player hosts; the others join through Steam invites — either from the friends list directly or through the game’s own invite flow, depending on the current patch’s interface. Everyone needs to be on the same game version, which matters more than it sounds: Sephiria has patched frequently since the July 31, 2026 launch, with version 1.0.25 and beyond arriving by August, and a friend whose Steam client has not finished updating will fail to join until it does. Once the party is in, the host’s descent is the party’s descent.
| Setup Step | What to Confirm Before the Run |
|---|---|
| Game version | All players updated to the same patch |
| Steam status | Online — not offline or appearing-offline in a way that blocks invites |
| Party size | Up to four players |
| Voice plan | Agreed before the first floor, not after the first wipe |
| Session host | Decided — the host’s run is the party’s run |
If invites fail outright rather than merely being fiddly, that is a troubleshooting problem rather than a setup one — our co-op troubleshooting guide covers the full symptom-by-symptom fix list, and the short version is: same version, Steam genuinely online, verify files, restart.
How Unlocks and Progress Work Per Player
The rule that surprises people — in a good way — is that unlocks apply personally. Unlocks and profile progress you earn during a co-op session are yours, credited to your own profile even though you were playing in someone else’s session. Co-op time is therefore never wasted time for your solo game: the tower teaches you the same floors either way, and your profile grows either way. Run-specific state, as in solo play, belongs to the run itself and ends with it.
This has a practical consequence for mixed-progress groups. A veteran hosting a newcomer is not carrying dead weight — the newcomer is banking personal unlocks the whole way down — and a newcomer hosting a veteran is not stalling the veteran’s completion chase, because achievements and reveals land on each player’s own profile. Play with whoever is available; the ledger sorts itself out.
Item Trading
Trading is where co-op builds get interesting. Teammates can trade items, which turns four separate loot streams into one shared economy: the weapon that dropped for your friend but fits your build stops being vendor trash and becomes your next upgrade. Done well, a trading party ends every floor stronger than four solo players walking the same floor would.
| Trading Approach | How It Plays in Practice |
|---|---|
| Need before greed | Drops go to whichever teammate’s build actually uses them |
| Free trade | Everything tradeable, everyone trusted, no bookkeeping |
| Round-robin on marquee drops | A simple rotation for the biggest finds, free trade for the rest |
Agree on loot manners before the first floor, not mid-argument. Any of the three systems above works; the only wrong system is not having one.
Reviving Teammates
Downed teammates can be revived, and the revive mechanic is what keeps four-player runs from collapsing at the first bad room. The practical guidance is universal regardless of the exact inputs the current patch uses: clear or disengage from pressure before attempting a revive, because a player mid-revive is a vulnerable player; stagger your positioning so the whole party is never inside one attack at once; and call out who is going for the pick-up so two players do not both stop shooting at the same moment. A party that manages revives well stays four-strong far deeper into the tower than four players merely playing side by side ever will.
Voice and Party Communication
Use voice. The official Discord is the natural home for organizing sessions and finding teammates, and it doubles as the most up-to-date source on co-op behavior whenever a patch lands. In-session, short callouts beat narration every time: direction of threats, revive requests, item offers, and hidden room finds. Assign one player to perimeter duty on each floor — four sets of eyes find more cracked walls and standalone rooms than one, and since constellation visits and hidden content exist in multiplayer too, the whole party’s checklists profit.
Steam Deck and Mixed Setups
Sephiria supports Steam Deck, which makes it a comfortable handheld co-op game for one player while the rest of the party sits at desktops. The usual mixed-setup advice applies: confirm everyone’s version matches after patch days, and treat the first session following any update as a shakedown run rather than a serious descent. If the Deck player hosts from a spotty Wi-Fi connection, expect the whole party to feel it — see the troubleshooting guide for connection-quality fixes.
Picking Teammates and Setting Expectations
A roguelite punishes mismatched expectations harder than most genres. Agree before the run on pace (full-clear explorers versus boss-rush speedrunners will make each other miserable), loot manners, and whether the session is for fun or for completion work. The official Discord’s community channels and r/sephiria are the places to find players whose goals match yours, and a party of four strangers with aligned goals will have a better run than four friends who wanted different things from the same hour.
Frequently Asked Questions
How many players does Sephiria co-op support?
Up to four players through Steam online multiplayer. The game supports Steam Deck too, so a mixed party of desktop and handheld players works fine.
Do I keep unlocks if I play in someone else’s session?
Yes. Unlocks earned in co-op apply personally — they are credited to your own profile regardless of whose session you joined, so co-op time always advances your solo game.
Can we trade items between players?
Yes, teammates can trade items with each other. Agree on a loot approach — need-before-greed, free trade, or round-robin on big drops — before the run starts to keep it friendly.
Our invites keep failing. Where do we start?
Read our dedicated co-op troubleshooting guide for the full symptom-by-symptom fix list. The short version: confirm everyone is on the same game version, set Steam to Online, verify game files, and restart.