Free Steam Key: One Piece Pirate Warriors 3

1. Go here
2. Sign up for an account / Login
3. Click "I need it!"
4. Confirm your E-mail
5. You will receive the key in your E-mail inbox

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