PC versionZX SpectrumWIP Fans have made a PC version. Some are still early, so read the project page first.
Fans took Chase H.Q. (ZX) apart and rebuilt it so it runs natively on a computer, often with widescreen, higher frame rates and mods. Here is the project we know about:
Chase H.Q. for ZX Spectrum — reverse-engineered and reconstructed in portable C