Downloading specific builds like from unofficial sources often presents several issues:
Files hosted on "free download" sites are frequently bundled with malware, miners, or adware that can compromise your PC. Space Crew Free Download (v15389)
Often featured in sales on the Space Crew: Legendary Edition Steam page. Space Crew Free Download (v15389)
The Legendary Edition update (which is free for owners of the base game) added a massive amount of content, including the "Android Ambush" campaign. Pirate versions often lack these major updates or the ability to sync with Steam Cloud saves. Space Crew Free Download (v15389)
If you encounter a game-breaking bug—common in complex strategy sims—you won't be able to receive official patches or support from the developers. Where to Get it Safely