AmiGTA1 Brings Native Grand Theft Auto Port to AmigaOS 68k

Amiga owners have a fresh project to look forward to as developer Grzegorz Korycki, previously recognized for OpenTTD for AmigaOS 68k, works on a new port called AmiGTA1. This ambitious undertaking is a ground-up reimplementation of the 1997 classic Grand Theft Auto engine, tailored specifically for native AmigaOS 68k systems. Rather than relying on modern hardware emulators or expansions like the PiStorm or Vampire, AmiGTA targets authentic classic setups. It requires a 68020 processor or higher along with either AGA or RTG graphics.

To stay within legal bounds, the release contains no copyrighted game code or assets. Instead, players must supply their own original PC files, which an included utility converts directly on the Amiga machine. The initial v0.0.2 alpha release already establishes an impressive technical foundation by rendering Liberty City in a gap-free 2.5D perspective while hitting a smooth 59.8 frames per second on the developer's calibrated setup. In its present state, users can explore the streets, carjack drivers, and navigate traffic using the original game's real-time physics, vehicle mass, and artificial intelligence routing.

Certain core mechanics—such as missions, weapons, audio, police presence, and wanted levels—are not yet fully wired up. However, the project operates as an extraordinary proof-of-concept for classic Amiga hardware capabilities. Written entirely from scratch as native 68020 code, the engine utilizes fixed-point math throughout, sine and cosine lookup tables, and is built around chunky-to-planar (c2p) conversions. The codebase features no floating point calculations, which avoids potential hazards on FPU-less machines utilizing Kickstart 3.1. The data layer complies with the official DMA CityScape Data Structure specification and the MIT-licensed Carnage3D project, while the platform layer incorporates elements from the developer's previous OpenXcom and OpenTTD Amiga ports.