4-player co-op is the biggest new feature in Slay the Spire 2. Here's everything confirmed about how it works — and how to play it well.
In co-op mode, 1-4 players each control their own Slayer and work together to climb the Spire. Based on confirmed details from the announcement trailer and developer info:
In solo play, you're limited to one character's card pool. In co-op, your team can cover weaknesses and stack strengths:
If you're playing an aggressive character with poor blocking, a teammate can run defensive cards and Frost Orbs. You no longer need to do everything yourself.
Vulnerability (takes 50% more damage) stacked by one player amplifies everyone's damage. Coordinate who applies debuffs and who dumps damage.
Elites and bosses become much more manageable when 4 decks are targeting the same enemy. The damage numbers in co-op should be staggering.
Relics that trigger off events (entering rooms, using potions, etc.) can chain between players for multiplied value. Discovering broken team combos will be part of the fun.
Based on STS1 character archetypes and confirmed STS2 mechanics, here are team compositions to try:
Decide who's the damage dealer, who blocks, who applies debuffs. Don't let everyone build the same way — you'll have gaps.
When offered cards, tell teammates what you're considering. A card that's mediocre for you might be exactly what they need.
Who saves potions for emergencies? Who uses them aggressively? Coordinate to avoid situations where everyone's out of healing at once.
Boss fights will likely scale with player count. Discuss the strategy before entering — who handles block, who saves burst damage for critical turns.
Up to 4 players. STS2 supports 1-4 players in co-op mode, with the game designed to work at all player counts.
Based on the announcement, STS2 co-op is designed for online multiplayer. Local co-op details have not been confirmed for Early Access.
Likely yes — each player will need their own copy of the game. No family sharing specifics confirmed yet.
Not confirmed yet. This is one of the most important questions for Early Access — we'll update immediately when MegaCrit clarifies the scaling system.
STS2 supports 1-4 players, so yes — solo runs remain available. Co-op is an addition, not a replacement.