While modern game development often relies on a framework like Unity, retro game developers have a similar tool named 8bit-Unity. It’s the ultimate game SDK for 80s computers.
The next update will add support for Oric 1/Atmos and Atari Lynx.
8bit-Unity: Roadmap Update#1 (Oric 1/Atmos, Atari Lynx, 8bit-Hub)