Public servers support up to 12 players — assign zones verbally; progress is shared.
2 players
Runner + shelver split — simplest co-op loop.
Player A — Runner
Upgrades: Assemble → Sprint → Carry
Zones: Floor-wide pickup; dumps at central pile
- Color-chain pickups across both floors
- Assemble piles before each dump
- Call category names aloud
Player B — Shelver
Upgrades: Sort → Insight → Shelf Guide
Zones: Rotates 1A–1J then 2A–2F as runner feeds
- Sort each dump by color/tag
- Place volumes in order for blue glow
- Insight sweep when % stalls
Best pairings for co-op teams
Matched by build plan, shared topics, and guide progression — not random related links.
Shared topicBeginner Guide
How to play Clean The Library — controls, first shelves, and stat points.
Shares co-op with what you just read
Build pairingBest Upgrades
Stat points and magic upgrade order.
Fits your co op plan — Best Upgrades covers the next step in that route
Build pairingUpgrade Planner
Pick solo, 100%, speedrun, or co-op — get a stat point upgrade order.
Fits your co op plan — Upgrade Planner covers the next step in that route