What engine is this?

[Peixe 9999]

Is this the Beevis Engine 5.0 by any chance?

[Goblin]

I assume you're just making a joke considering your suggestion, but in case you actually want to know: none. Just (presumably) C or C++, going off the credits listing stb_image and std_vorbis. Those are single-file libraries that compile in both those languages, though there may be wrappers for other languages. If I had to guess I'd go with C++.
Since it doesn't list any other library, Billy presumably did everything including window handling himself, not even using a framework like SDL. So just directly using the Windows API (or equivalent on consoles) and then using either OpenGL, DirectX, or Vulkan to access the GPU.

[Ryoko-Sha]

Originally posted by Goblin:

I assume you're just making a joke considering your suggestion, but in case you actually want to know: none. Just (presumably) C or C++, going off the credits listing stb_image and std_vorbis. Those are single-file libraries that compile in both those languages, though there may be wrappers for other languages. If I had to guess I'd go with C++.
Since it doesn't list any other library, Billy presumably did everything including window handling himself, not even using a framework like SDL. So just directly using the Windows API (or equivalent on consoles) and then using either OpenGL, DirectX, or Vulkan to access the GPU.

As far as i know its a in house engine made by the developer just for this game

[Goblin]

Originally posted by Ryoko-Sha:

As far as i know its a in house engine made by the developer just for this game

Which is what I said.
Using a library like SDL/GLUT/SFML/etc. to get a rendering context is still considered "not using an engine" AKA your own engine. Billy did use two libraries for reading images and sound files after all.

[Peixe 9999]

Originally posted by Goblin:

I assume you're just making a joke considering your suggestion, but in case you actually want to know: none. Just (presumably) C or C++, going off the credits listing stb_image and std_vorbis. Those are single-file libraries that compile in both those languages, though there may be wrappers for other languages. If I had to guess I'd go with C++.
Since it doesn't list any other library, Billy presumably did everything including window handling himself, not even using a framework like SDL. So just directly using the Windows API (or equivalent on consoles) and then using either OpenGL, DirectX, or Vulkan to access the GPU.

Amazing.
Thanks for the info.