Downloading game files as .rar archives from unofficial sources carries significant risks:
You do not need to download multiple copies for your friends. Only the Defuser needs a copy of the game; the Experts can view or print the free manual for free.
The game uses a verification system to ensure the Defuser's game version matches the Experts' manual version. Pirated versions often break this synchronization, making the game unplayable.
The game is frequently on sale. While the standard price is around $14.99, it often drops by 67% or more (as low as $4.94) on SteamDB .
Files with this naming convention often originate from peer-to-peer or unauthorized sites, which frequently bundle malware, spyware, or ransomware within the archive.