Are you getting a (like "CRC failed")?
: Ensure you have downloaded every part of the version (0.11c). If one is missing, the extraction will fail. DesertStalker-0.11c-pc.part3.rar
: If the software says "Unexpected end of archive," you are likely missing the final part of the sequence. If you'd like, let me know: Are you getting a (like "CRC failed")