Co-op games on Steam

How Steam games tagged Co-op did, which ones found an audience, and where the gaps are.

The best-known Co-op games

• Counter-Strike 2 (2012): 9,944,999 reviews
• Dota 2 (2013): 2,804,255 reviews
• PUBG: BATTLEGROUNDS (2017): 2,748,724 reviews
• Grand Theft Auto V Legacy (2015): 1,898,823 reviews
• Tom Clancy's Rainbow Six Siege (2015): 1,566,180 reviews
• Team Fortress 2 (2007): 1,255,553 reviews
• Terraria (2011): 1,247,762 reviews
• Rust (2018): 1,176,635 reviews
• Apex Legends™ (2020): 1,075,083 reviews
• HELLDIVERS™ 2 (2024): 847,777 reviews
• ELDEN RING (2022): 834,397 reviews
• Left 4 Dead 2 (2009): 822,865 reviews
• Dead by Daylight (2016): 690,196 reviews
• Phasmophobia (2020): 685,968 reviews
• Warframe (2013): 681,040 reviews
• Destiny 2 (2019): 664,312 reviews
• Among Us (2018): 662,348 reviews
• ARK: Survival Evolved (2017): 588,569 reviews
• Unturned (2017): 565,006 reviews
• Valheim (2021): 475,046 reviews
• Fall Guys (2020): 467,924 reviews
• PAYDAY 2 (2013): 445,882 reviews
• Rocket League® (2015): 431,786 reviews
• Overwatch® (2023): 428,899 reviews