I understand you're looking for information about Factorio on Linux, including free downloads (2021) and reviews. I want to provide helpful context:

2. Malware Risk on Linux is Real

Linux users often feel invincible. In 2021, malware targeting Linux gamers increased significantly. Downloading a factorio_crack.sh script or an untrusted AppImage from a forum is a fantastic way to install a crypto miner or a rootkit.

Download Factorio (Demo) This is a free publicly accessible demo. It contains only a subset of what is available in the full game. Install guide - Official Factorio Wiki

  1. Go to factorio.com/download.
  2. Select Linux (64-bit).
  3. Download the .tar.xz file (no installer required—extract and run).
  4. Run the bin/x64/factorio executable.

: Downloads from unofficial sources frequently contain scripts or binaries that can compromise your Linux system. No Updates