Updating Gun Rocket through 10 years of Unity Engine | Hacker News

Hacker News discusses how hard it is to build a Unity-like game engine from scratch.

The post sketches a possible stack: SDL or Qt for windowing, wgpu or bgfx for rendering, OpenAL Soft for audio, and Jolt or Bullet for physics.

It argues that making all these pieces work together, plus ECS, scene management, and scripting bridges, takes years of architecture and systems expertise.

The takeaway: replacing or emulating a mature engine like Unity is a major engineering challenge for engine teams and game studios.