And also... Space Pilgrim Episode I: Alpha Centauri is currently free but for a limited time!?
More information here:https://steamcommunity.com/gid/103582791440769196/announcements/detail/3181150980057579691
Instructions:
1. You just need to install the game via Steam.
2. That's it! Enjoy.
Space Pilgrim Episode I: Alpha Centauri Discussion: 1
Extremely easy to obtain