The Earth 2150 trilogy is free, until Steam keys run out.
Here’s some information about the trilogy:
Getting it for free
There is a bit of prior work required to get the trilogy for free. It should take you roughly 5 to 7 minutes. You’re mostly just clicking buttons.
Register an account at https://www.xplayn.com/ or log into an existing one.
On your profile (https://www.xplayn.com/user/me/edit), add the current gaming hardware that you use and answer a few review questions about them (no typing required, just clicking buttons).
- You must review one of each: a mouse, a keyboard, a headset and a mousepad.
- Once done, click the blue button that appears underneath the four things you just reviewed.
Go here: https://www.xplayn.com/blog/earth-2150-giveaway. Scroll down to the blue form and enter the email address you registered to the site with. Then prove you’re not a bot (or are you?) and click “Get Your Steam Key”.
Copy your key. Log into Steam and go here to redeem the key: https://store.steampowered.com/account/registerkey