Complex sentence: Twilight was a UK video game development group, active from 1989 until around 1995, originally developing game conversions for Hi-Tec Software, Ocean Software and Thalamus Ltd on the 8-bit platforms: the ZX Spectrum, Amstrad CPC and Commodore 64.
Split into simpler sentences: Twilight was a UK video game development group, active from 1989 until around 1995. Originally developing game conversions for Hi-Tec Software, Ocean Software and Thalamus Ltd on the 8-bit platforms: the ZX Spectrum, Amstrad CPC and Commodore 64.