[ary]

How does Source 2 not make it onto this "Market Map"? It's mostly used by Valve and a smaller number of studios than something like Unreal, but it's viable none the less. I suspect it has a much broader user reach than several of the entries on the Open Source end of this map.

https://developer.valvesoftware.com/wiki/Source

Perhaps it doesn't qualify by some arbitrary "next generation" status, but Unreal does?

[Tanoc]

It's also missing Panda3D, Armoury 3D, and Construct, which are all used in very well known indie games. While including GDevelop which is a teaching tool for children not actually meant to create commercial software, and Dreams which isn't a game engine but a sandbox game for the PlayStation 4 for creating interactive fiction. And meanwhile Yahaha isn't even a game engine, it's Web3 software designed for Decentraland and Horizon Worlds, which are so dead the corpse doesn't even smell anymore.

[filterfiber]

AFAIK there's no public sdk for it, only a single third party game is in development and it's by the developers of garry's mod (one of the biggest third party source "1" games).

I'd consider it still proprietary, at that point you'd want to add Snowdrop (ubisoft), RAGE (Rockstar), REDengine (CDPR), Frostbite (EA), etc.

[dogma1138]

It seems that all the engines listed are publicly available with a defined licensing scheme for 3rd party development.

Source doesn’t fall under this there are dozens of other proprietary engines out there.

[kevingadd]

a16z doesn't know anything about video games, basically. A bunch of stuff widely used isn't on this map at all and instead there are buzzword startups on the map that will never be used to ship a video game to customers.