Free steam-key:

https://epicdeal.gamesrepublic.com/game/strategy,anomaly-warzone-earth,123.html

http://store.steampowered.com/app/91200/]Steam-store-page

Steps needed?

Get a free gamesrepublic.com account. If you have one follow the link to get your key. It will be added to your gamesrepublic account where you can choose to get a version for steam or other platforms

Free steam-key:

http://www.dlh.net/

https://www.youtube.com/watch?v=JbS_tqI42C0

Steps needed?

Get a free dlh.net account. If you have one click on profile/keys to get your key

Free steam-key:

https://www.indiegala.com/store

http://store.steampowered.com/app/307070/]Steam-store-page

Steps needed?

Enter your email address on the indiegala website

Free steam-key:

http://www.playnation.de/spiele-news/indiegala/250-000-kostenlose-steam-keys-ionball-2-ionstorm-id57871.html

http://store.steampowered.com/app/287120/]Steam-store-page

Steps needed?

LIKE Indiegala on FaceBook
LIKE VG247 on FaceBook
Enter your email address on the vg247 website/form
Share the info (optional)

Knightshift
Enclave
Knights and Merchants HD
Pirates of Black Cove
East India Company Gold Edition[topwareshop.com]

Steps needed?

Goto http://www.dlh.net/de/register
Create a (free) account.
When ready look @ your fresh dlh-profile and grab your free games^^

There´s a limit of 500 keys per hour and 10000 keys per day
but that should be no problem.