In order for you to play X-COM: Apocalypse on Windows with minimal graphics settings, your computer must meet the following requirements
Supported OS:
Microsoft® 2000/XP/Vista®
Processor:
Pentium 90MHz or better
Memory:
16Mb RAM
Graphics:
Supported 32Mb Graphics Card
Sound Cards Supported:
Sound Blaster and 100% compatibles, Microsoft Sound System, ESS Audio Drive, ProAudio Spectrum, Ensoniq Soundscape and Gravis UltraSound
Hard Drive:
60 MB Hard Disk Space