Co-op games where one copy is enough

Online co-op where at most one of you has to pay: free games, friend passes, and Steam Remote Play Together, where the owner streams the game to a friend.

• Split Fiction, 10/10 · 2 players (2025)
• Baldur's Gate 3, 10/10 · 1-4 players (2023)
• It Takes Two, 10/10 · 2 players (2021)
• Trine 2, 10/10 · 1-3 players (2013)
• Portal 2, 10/10 · 1-2 players (2011)
• Cuphead, 9/10 · 1-2 players (2017)
• Trine 4, 9/10 · 1-4 players (2019)
• Trine, 9/10 · 1-3 players (2009)
• Magicka, 9/10 · 1-4 players (2011)
• Divinity: Original Sin, 9/10 · 1-2 players (2014)
• A Way Out, 9/10 · 2 players (2018)
• Popucom, 8/10 · 2 players (2025)
• Escape Academy, 8/10 · 1-2 players (2022)
• Overcooked, 8/10 · 1-4 players (2016)
• Left 4 Dead 2, 8/10 · 1-4 players (2009)
• Stardew Valley, 8/10 · 1-8 players (2016)
• Human: Fall flat, 8/10 · 1-8 players (2016)
• Stick It to the Stickman, 7/10 · 1-2 players (2025)
• Emissary Zero, 7/10 · 1-4 players (2025)
• PAW Patrol: Mighty Pups, 7/10 · 1-2 players (2020)
• Castle Crashers, 7/10 · 1-4 players (2012)
• Unravel Two, 7/10 · 1-2 players (2020)
• Door Kickers, 7/10 · 1-2 players (2014)
• We Were Here, 7/10 · 2 players (2017)
• Ghost Recon: Breakpoint, 6/10 · 1-4 players (2019)
• Keep Talking and Nobody Explodes, 6/10 · 2-3 players (2015)
• A Hat in Time, 6/10 · 1-2 players (2017)
• Trine 3, 6/10 · 1-3 players (2015)