Blizzard Entertainment is a video game developer that also produces popular online multiplayer games across various genres, such as World of Warcraft, Overwatch, Hearthstone, and Diablo
Valve Corporation is a video game developer that also operates the Steam digital distribution platform and creates influential online multiplayer games in different genres, such as Dota 2, Counter-Strike, Team Fortress, and Half-Life
Epic Games is a video game developer that also owns the Unreal Engine and the Epic Games Store, and develops and publishes popular online multiplayer games in various genres, such as Fortnite, Gears of War, Unreal Tournament, and Rocket League
Ubisoft is a video game developer and publisher that also produces a wide range of online multiplayer games across various genres and platforms, such as Assassin's Creed, Rainbow Six, Tom Clancy's The Division, and Watch Dogs
Activision is a video game publisher and a subsidiary of Activision Blizzard, that also publishes some of the most successful online multiplayer games in the industry, such as Call of Duty, Destiny, and Crash Bandicoot