Free Steam Game: Incoming Forces

1. Go here
2. Enter a valid e-mail
3. Click 'Redeem'
4. Verify the captcha
5. Click 'Submit' & you will receive the key in your e-mail inbox

Bonus:

G2A: Prices Cut In Peaces Sale - 3% off voucher: KINGS

Fallout 4 - 20% off coupon: 20PERC-DECMBR-SVINGS

Fallout 4 Season Pass Deal - 20% off coupon: 20PERC-DECMBR-SVINGS

Call of Duty Black Ops 3 - 20% off coupon: 20PERC-DECMBR-SVINGS

GOG: Big Winter Games Sale and Bundles

Digital Video Game Deals 2015