

Some of them work with multiple engines, not only custom ones but also licensed ones. The BIG Companies *From left to right: Assassin's Creed Odyssey, Final Fantasy XV, Red Dead Redemption 2 Below list is for very big corporations, sometimes with complex corporate structures with several divisions (not only focused on videogames) and various studios/subsidiaries developing games. *NOTE: I tried to be as much accurate as possible with the information about the employees count (I checked the companies websites, Wikipedia or company LinkedIn) but take it with a grain of salt (some employees numbers could not be up to date). Also, important to note, most of those engines use numerous middleware for specific functionalities (Platform, Physics, Network, Vegetation, UI, Rendering, Audio.). Most of the engines listed here have been developed along the years with multiple iterations and multiple videogames, those engines have gone through several versions or even complete (or semi-complete) rewrites from scratch, with a consequent engine name change. Nowadays lots of companies choose engines like Unreal or Unity for their games (or that's what lot of people think) because developing a custom AAA-level engine requires lots of resources, so, I decided to list here some of the most popular custom engines with the team-sizes and notable titles released with those engines. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated.

I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. CUSTOM GAME ENGINES: A Small Study A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio.
