Best Online Co-Op Games on Steam

Steam currently has 5,139 Online Co-Op games available to download and play. Explore our list of the best picks ranked by Player Score. Our Player Score rankings are calculated directly from reviews left on the Steam store and will be updated in real-time as more players leave their feedback. Online Co-Op game rankings were last updated on 5/16/2024.

Looking for more? Explore other lists such as:

1. Terraria

Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

Terraria banner

Terraria holds the #1 spot for "best Online Co-Op game on Steam" with a Player Score of 97. Its score was calculated by analyzing a total of 1,284,858 reviews on Steam. This breaks down to a total of 1,254,360 positive reviews and 30,498 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $9.99
Release Date 5/16/2011
Developer Re-Logic
Publisher Re-Logic
Steam App Id 105600

2. Left 4 Dead 2

Set in the zombie apocalypse, Left 4 Dead 2 (L4D2) is the highly anticipated sequel to the award-winning Left 4 Dead, the #1 co-op game of 2008. This co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.

Left 4 Dead 2 banner

Left 4 Dead 2 has achieved a Player Score of 97, placing it in the #2 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 854,815 reviews on Steam. This breaks down to a total of 833,682 positive reviews and 21,133 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $9.99
Release Date 11/16/2009
Developer Valve
Publisher Valve
Steam App Id 550

3. Lethal Company

A co-op horror about scavenging at abandoned moons to sell scrap to the Company.

Lethal Company banner

Lethal Company has achieved a Player Score of 97, placing it in the #3 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 394,907 reviews on Steam. This breaks down to a total of 384,973 positive reviews and 9,934 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on Windows systems. At the moment, it is possible to play Lethal Company on the Steam Deck (though some functionality may be limited).

Steam Price $9.99
Release Date 10/23/2023
Developer Zeekerss
Publisher Zeekerss
Steam App Id 1966720

4. Bloons TD 6

The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available.

Bloons TD 6 banner

Bloons TD 6 has achieved a Player Score of 96, placing it in the #4 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 307,757 reviews on Steam. This breaks down to a total of 299,626 positive reviews and 8,131 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $4.89 to play and can be played and ran on both Windows and Mac systems. At the moment, it is possible to play Bloons TD 6 on the Steam Deck (though some functionality may be limited).

Steam Price $4.89
Release Date 12/18/2018
Franchise Ninja Kiwi Games
Developer Ninja Kiwi
Publisher Ninja Kiwi
Steam App Id 960090

5. Garry's Mod

Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

Garry's Mod banner

Garry's Mod has achieved a Player Score of 96, placing it in the #5 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 1,067,095 reviews on Steam. This breaks down to a total of 1,032,248 positive reviews and 34,847 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $9.99 to play and can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play Garry's Mod on the Steam Deck (though some functionality may be limited).

Steam Price $9.99
Release Date 11/29/2006
Developer Facepunch Studios
Publisher Valve
Steam App Id 4000

6. tModLoader

Dig, Fight, and Build your way through the world of player-created mods on Terraria with tModLoader - this DLC makes modding Terraria a reality!

tModLoader banner

tModLoader has achieved a Player Score of 96, placing it in the #6 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 248,755 reviews on Steam. This breaks down to a total of 241,425 positive reviews and 7,330 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is completely free to play and can be played and ran on Windows, Mac, and Linux systems. At the moment, it is possible to play tModLoader on the Steam Deck (though some functionality may be limited).

Release Date 5/16/2020
Developer TML Team
Publishers
Steam App Id 1281930

7. Baldur's Gate 3

Baldur’s Gate 3 is a story-rich, party-based RPG set in the universe of Dungeons & Dragons, where your choices shape a tale of fellowship and betrayal, survival and sacrifice, and the lure of absolute power.

Baldur's Gate 3 banner

Baldur's Gate 3 has achieved a Player Score of 96, placing it in the #7 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 609,243 reviews on Steam. This breaks down to a total of 589,632 positive reviews and 19,611 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $50.99 to play and can be played and ran on both Windows and Mac systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $50.99
Release Date 8/3/2023
Developer Larian Studios
Publisher Larian Studios
Steam App Id 1086940

8. BattleBlock Theater®

Welcome to BattleBlock Theater! You’ve got no where to go but up...on stage. Play single player or co-op to free your friends and save Hatty Hattington! Jump, solve and battle your way through a mysterious theater inhabited by highly technological felines.

BattleBlock Theater® banner

BattleBlock Theater® has achieved a Player Score of 96, placing it in the #8 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 70,085 reviews on Steam. This breaks down to a total of 68,158 positive reviews and 1,927 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $14.99 to play and can be played and ran on Windows, Mac, and Linux systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $14.99
Release Date 5/15/2014
Franchise The Behemoth
Developer The Behemoth
Publisher The Behemoth
Steam App Id 238460

9. PowerWash Simulator

Release the Pressure with PowerWash Simulator! Wash away your worries with the soothing sounds of high-pressure water. Fire up your power washer and blast away every speck of dirt and grime you can find, all with the simple satisfaction of power-washing to a sparkling finish.

PowerWash Simulator banner

PowerWash Simulator has achieved a Player Score of 95, placing it in the #9 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 43,803 reviews on Steam. This breaks down to a total of 42,634 positive reviews and 1,169 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $19.99 to play and can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $19.99
Release Date 7/14/2022
Developer FuturLab
Publisher Square Enix
Steam App Id 1290000

10. Risk of Rain 2

Escape a chaotic alien planet by fighting through hordes of frenzied monsters – with your friends, or on your own. Combine loot in surprising ways and master each character until you become the havoc you feared upon your first crash landing.

Risk of Rain 2 banner

Risk of Rain 2 has achieved a Player Score of 95, placing it in the #10 spot for the best Online Co-Op games. Its score was calculated by analyzing a total of 271,923 reviews on Steam. This breaks down to a total of 261,853 positive reviews and 10,070 negative reviews — making it "Overwhelmingly Positive" on Steam.

It is priced at $24.99 to play and can be played and ran on Windows systems. Valve has also verified it as playable on the Steam Deck and will run well.

Steam Price $24.99
Release Date 8/11/2020
Franchise Risk of Rain Franchise
Developer Hopoo Games
Publisher Gearbox Publishing
Steam App Id 632360

More Online Co-Op Games

Explore even more rankings for the 100 best Online Co-Op games available on Steam.

ImageName
Actions
Terraria steam charts
15,706
5/16/2011
97
$9.99
Steam Charts
Left 4 Dead 2 steam charts
10,091
11/16/2009
97
$9.99
Steam Charts
Lethal Company steam charts
4,820
10/23/2023
97
$9.99
Steam Charts
Bloons TD 6 steam charts
7,517
12/18/2018
96
$4.89
Steam Charts
Garry's Mod steam charts
11,071
11/29/2006
96
$9.99
Steam Charts
tModLoader steam charts
17,737
5/16/2020
96
Free
Steam Charts
Baldur's Gate 3 steam charts
33,611
8/3/2023
96
$50.99
Steam Charts
BattleBlock Theater® steam charts
54
5/15/2014
96
$14.99
Steam Charts
PowerWash Simulator steam charts
1,091
7/14/2022
95
$19.99
Steam Charts
Risk of Rain 2 steam charts
9,636
8/11/2020
95
$24.99
Steam Charts
Just Shapes & Beats steam charts
35
5/31/2018
95
$19.99
Steam Charts
Phasmophobia steam charts
4,529
9/18/2020
95
$13.99
Steam Charts
Clone Drone in the Danger Zone steam charts
109
7/27/2021
95
$19.99
Steam Charts
Left 4 Dead steam charts
244
11/17/2008
95
$9.99
Steam Charts
Wobbly Life steam charts
569
7/8/2020
95
$17.99
Steam Charts
Tabletop Simulator steam charts
2,111
6/5/2015
95
$9.99
Steam Charts
WolfQuest: Anniversary Edition steam charts
111
7/26/2019
94
$19.99
Steam Charts
Dying Light steam charts
14,111
7/15/2021
94
$19.99
Steam Charts
Saints Row: The Third steam charts
87
11/15/2011
94
$9.99
Steam Charts
The Planet Crafter steam charts
2,771
4/10/2024
94
$23.99
Steam Charts
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Soures & References

Steambase has best-in-class data powered directly by Steam, our data partners, and in-house experts. Reviews and rankings are enriched, analyzed, and updated in real-time to ensure we surface the most up-to-date insights. Learn more about the Steambase approach to data collection and our review methodology.

  • Valve Corporation. (2024, May 16). Steam Store. Steam Store.
  • Valve Corporation. (2024, May 16). Terraria on Steam. Steam Store.
  • Valve Corporation. (2024, May 14). Left 4 Dead 2 on Steam. Steam Store.
  • Valve Corporation. (2024, May 18). Lethal Company on Steam. Steam Store.
  • Valve Corporation. (2024, May 21). Bloons TD 6 on Steam. Steam Store.
  • Valve Corporation. (2024, May 20). Garry's Mod on Steam. Steam Store.
  • Valve Corporation. (2024, May 20). tModLoader on Steam. Steam Store.
  • Valve Corporation. (2024, May 20). Baldur's Gate 3 on Steam. Steam Store.
  • Valve Corporation. (2024, May 16). BattleBlock Theater® on Steam. Steam Store.
  • Valve Corporation. (2024, May 17). PowerWash Simulator on Steam. Steam Store.
  • Valve Corporation. (2024, May 21). Risk of Rain 2 on Steam. Steam Store.

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