http://store.steampowered.com/app/332480/

1. Register on http://www.splitplay.com/

2. Login.

3. Go to http://www.splitplay.com/pt/games/phoenix-force#

4. Press the green button.

5. Get the key ( Sometimes the keys will be replenished, so you've to wait a while. )

(Proof for more keys: https://twitter.com/splitplay )

Have fun

Game: Anomaly Warzone Earth
Link: https://gamesrepublic.com/game/strategy,anomaly-warzone-earth,123.html

1. Make an account at Games Republic
2. Check your email
3. Confirm and choose your username and password
4. Go to “Profile / My Games” at Games Republic
5. Click the GET IT link and that’s it!

Go to http://greenlightarcade.com/contest/wickland/

Link your steam account there and you will get this game!

Free Steam Games

Chaos Domain: https://www.indiegala.com/store
*Just enter your mail at the top of the page and click redeem. You will receive your key via E-Mail.

Free Arc Games

Torchlight: http://www.arcgames.com/en/games/torchlight
*Install Arc and press on "Play Now"-button. Your game will be downloaded on your Arc Client.

DRM-Free

Beneath The Crimson Moon: http://www.moddb.com/downloads/beneath-the-crimson-moon

Some free games you can get after registering on http://www.dlh.net/en/ .

You missed Metro2033? Here:
https://www.humblebundle.com/gift?key=YzV644hC5SGw67Ee

Free For a Limited TIME!

Go get it while you can:

http://www.epicbundle.com/article/steam-key-for-free-receiver

Click the link and follow the steps to get your key!