Please feel free to comment with your suggestions and I will edit them into a list so they can quickly take a look.

Requirements: Must be at least 3 player co-op I will add 2 player ones to the list but we want to focus on 3

• Move or Die

• Nosgoth

• 100% Orange Juice (sort of like mario party style)

• Spintires

• 7 Days to Die

• Garry's Mod

• Reign of Kings (building)

• Talisman

• Elite Dangerous

• Offworld Trading Company

• theHunter Primal

• L4D1 and 2

• Payday 2

• Evolve

• Insurgency

• Primal Carnage: Extinction

• Worms Games

• Dungeon Defenders

• Survarium

• It Came form Space and Ate Our Brains

• Unturned (3.0 Patch)

• GTA V Heists

• Diablo 2/3

• Far Cry 3/4

• Speedrunners

• Magicka

• Robocraft

• Killing Floor

• World of Warships

• Guns of Icarus

• Monaco

• Terraria

• Trials Fusion

• Screencheat

• Teeworlds

• Half Life 3

• Zero Gear

• BroForce

• Supraball

• Space Engineers

.....more to come

Edit: Added more from suggestions