56%Good matchBiped 2
65%1k65% positive reviews, Mixed across 1k reviews·Funny · Puzzle
—







CO-OP TWINS – a two-player cooperative deck-building roguelike. Split-screen chaos. Two players, one rhythm, one deck. Total co-op mayhem. Rhythm action meets deck-building card play. Two players, one body. This is fusion co-op like you’ve never seen.
Co-Op Twins
Steam
Two players take on the roles of twin sisters “Co” and “Op”, exploring dungeons together in split-screen gameplay!
🎵 Rhythm Action or Deck-Building Card Play 🃏
🎵 [Co – the younger twin] “Co” is an optimistic ENFP who loves rhythm games and excels in melee combat. Attack in sync with the background music (BGM) beats to build up Rhythm Stacks! Keep the rhythm going to boost your attack power and activate powerful co-op skills!
🃏 [Op – the older twin] “Op” is a cool-headed INTP who enjoys card games and specializes in ranged attacks. Use talisman cards with various effects by placing them onto the battlefield! Drag cards directly onto enemies or set down lasting effect cards for strategic play.
🤝 Cooperative Gameplay
Even when apart, Co and Op can support each other by building Co-Op Stacks and sharing bonuses.
On top of that, various co-op skills and hidden mechanics await, letting the twins grow stronger through teamwork.
🧬 Fusion Mode
During their dungeon journey, the twins suddenly reunite—only to be fused into a single body by a glitch!
Now, both players control one fused character:
※ A special Hardcore “Fusion Mode” is also available for solo players!
📦 Cardboard Dungeon
Venture through endless cardboard box dungeons, battling ferocious monsters and chapter bosses together! Even in defeat, loot and resources you’ve collected remain, fueling permanent upgrades for your next run.
🐱 Shifting Storytelling
In this world where reality and the game blend together, the twins receive guidance from a mysterious cat NPC, “Schrödinger.”
With each cycle of death and rebirth, your choices shape the dungeon: NPC dialogue, branching paths, and story direction gradually evolve.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
Biped 2Shares Community tag: Local Co-Op · Split Screen · Shared/Split Screen Co-op , adds Funny65% · 1k positive reviews56%Good match—
GreedlandShares Community tag: Local Co-Op · Roguelite · Bullet Hell , adds Shoot 'Em Up83% · 580 positive reviews56%Good match—
SUPER CRAZY RHYTHM CASTLEShares Community tag: Local Co-Op · Rhythm · Shared/Split Screen Co-op , adds Music77% · 317 positive reviews55%Good match—
Full Metal FuriesShares Community tag: Local Co-Op · Bullet Hell · Shared/Split Screen Co-op , adds Beat 'em up91% · 2k positive reviews55%Good match—
StrugglingShares Community tag: Local Co-Op · Shared/Split Screen Co-op · Remote Play Together , adds Funny93% · 382 positive reviews55%Good match—
Split FictionShares Community tag: Local Co-Op · Split Screen · Sci-fi , adds Female Protagonist97% · 128k positive reviews55%Good match—All matches
The best games like Co-Op Twins are Biped 2, Greedland, SUPER CRAZY RHYTHM CASTLE, Full Metal Furies, and Struggling.
Match on: filter matches for Co-Op Twins by tag