Sephiria supports online co-op for up to four total players through Steam. Complete the Prologue or Tutorial, use the Mysterious Door in Bunnyville to create a Steam lobby, then invite up to three friends after that lobby exists. Official material confirms item trading and teammate revives, while local split screen, exact save ownership, and shared progression rules are Pending confirmation.
01 Co-op requirements and party size
The official Steam material confirms online co-op for one host and as many as three guests. It also confirms that players can trade items and revive fallen companions. Local co-op and split screen are not listed in the collected official features.
The recorded PC setup says both host and guests should complete the Prologue or Tutorial first. Continue until Bunnyville and its multiplayer access point are available, and keep Steam online on every machine. Menu labels can move between patches, so the current prompt remains authoritative.
02 How the host creates a Steam lobby
The host enters Bunnyville and interacts with the Mysterious Door. Select the recorded “Create Steam Lobby” option, then wait for the session to exist before sending any invitation. This player becomes the host and the active target for friend invites.
Open the Steam friends list or Steam Overlay and invite each player after lobby creation. Steam’s default Overlay shortcut is Shift + Tab, but a customized shortcut takes priority. Send a fresh invitation if the lobby is recreated because an older invite can point to a dead session.
03 How guests join the host
Each guest completes the Prologue or Tutorial and asks the host to create the lobby first. Accept the newest Steam invitation for that active session, then wait for Sephiria to connect to the host. Tell the host immediately if joining stalls instead of letting the rest of the party begin.
Once connected, confirm that the expected characters are present and the party can proceed through the lobby flow. Repeat this check for every guest rather than assuming one successful connection proves all four seats. Different local network conditions can affect one friend while the others join normally.
04 Trade items without breaking two builds
Item trading is an official co-op feature. Select the intended item, use the current Drop control shown by the inventory, and let the named teammate collect it after the room is safe. Confirm that the correct piece left the giver’s board before moving on.
Read the item’s trigger, tags, shape, and Tablet placement cost before transferring it. A trade is useful when the receiver can activate the piece now and the giver does not lose a more valuable working connection. Do not treat every pickup as automatically communal or take an item for an imagined final build.
05 Revive one player while others create safety
Official 1.0 material confirms that fallen companions can be revived. It does not publish a fixed revive duration, interruption rule, or penalty in the supplied archive. Follow the prompt shown by the current build.
Call out the downed teammate and location so the group stops splitting attention. One player should draw or clear immediate threats, one should commit to the revive, and the remaining players should protect that attempt. Crowding every character onto the same point can make patterns harder to read without speeding a rule that has not been verified.
After the revive, create space before resuming full damage. Keep at least one party member able to disengage when pressure shifts, especially during a boss or dense wave. Exact post-revive health, invulnerability, and repeated-down rules are Pending confirmation.
06 Build roles without forcing classes
Sephiria uses weapon and inventory routes rather than mandatory multiplayer classes. A Sword and Shield player can hold a defensive line, a Crossbow user can preserve a firing angle, and mobile or wide-coverage weapons can respond to isolated threats. These are practical jobs, not fixed matchmaking roles.
Describe each current core in one sentence before entering the tower. Name the weapon action, main Artifact trigger, and resource need that already work, then route shared loot toward immediate value. This prevents four individual builds from competing for every attractive pickup.
07 Plan shared pressure during bosses
Keep one player ready to protect a revive and assign another to clear summoned threats when they prevent safe focus on the boss. The remaining players can maintain damage without abandoning their own defensive timing. This role split is a coordination method, not evidence of a required composition.
Call important states briefly: a downed teammate, an elite threat, a newly found secret room, a shop, or the boss entrance. Stop moving forward when someone is rearranging a grid or lacks the resources expected for the fight. A coordinated pause is safer than forcing every player to read several inventories during combat.
08 Shared progression and save ownership
The official material confirms trading and revives but does not specify whether XP, currency, quest credit, or every unlock is shared. It also does not establish that host and guest progress always saves identically. Do not assume one communal rule for all rewards.
Before a long campaign session, agree on a host and run a short test. Record each player’s relevant currency or objective, complete one small session, return to town, and compare the resulting state. Preserve the same player and save combination when reporting a discrepancy.
If the results differ, label the exact behavior with the current version rather than generalizing from one party. Host ownership, guest unlock persistence, disconnect recovery, and edge-case quest credit are Pending confirmation until controlled current-version tests or official documentation establish them.
09 Fix an invitation that does not connect
Confirm that the host selected Create Steam Lobby before sending the invite. Recreate the lobby, discard the old invitation, and send a fresh Steam invite after the new session exists. Verify that both Steam and Sephiria are current and online.
When one friend fails while another joins, troubleshoot the affected guest separately. Check that the Tutorial is complete, accept only the newest invitation, restart Steam and Sephiria, and try a different host if the same connection repeatedly fails. Start diagnosis with two players before adding the full party.
If the Overlay or invite command is absent, verify Steam’s Overlay setting and the user’s customized shortcut. Review current official patch notes for lobby, disconnect, or client fixes, then record any repeatable error with versions and steps. Log locations and developer-specific recovery instructions are Pending confirmation unless supplied by current official support.
10 A safe first co-op checklist
Have every player complete the Tutorial, update the game, and reach Bunnyville. Let the agreed host create the lobby at the Mysterious Door, send fresh Steam invitations, and wait for all intended guests. Confirm one short session before committing to a long progression goal.
During the run, announce core item needs, trade only after checking both inventories, and protect one reviver when a teammate falls. After returning to town, compare progression on every save. New players can review the beginner guide, while established parties can choose compatible routes from Sephiria builds.