Free Steam Key: Stealth Inc 2

A free Steam key giveaway from the Humble Store

1. Go here
2. Click on the "Get it for Free" button
3. Click on Checkout
4. Fill in your e-mail & solve captcha
5. The key should be sent to your e-mail

Bonus:

G2A: Offers Mad to the Max Weekly Deals - 3% off voucher: KINGS

GMG: The Great Indoors Weekend Sale - 22% off voucher: PAYDAY-22PERC-OFFNOW

25% Off All Upcoming Games - 25% off voucher: DEALZO-N25OFF-STAGMG

GOG: Back to Old School Build A Bundle