Here's a fun fact about this game, outside of a short demo it is assumed that the game never got a full release on PC. Telegames claims the game went out to stores but no one has found a physical copy of it and there's no download links for it on the internet. The GBA version is the best you're gonna get. The game plays like Wolfenstein 3D with some extra mechanics like rescuing people and interacting with computer terminals. Seeing 3D on the GBA is impressive but the game is not the greatest. Unless you're taking a deep dive of the GBA library or have a fondness for FPS games showing up on unusual platforms, it's best to skip this.