Humble Bundle is currently giving away free Steam keys for Kingdom: Classic! You just need to Subscribe to the Humble Bundle newsletter to score a key, it's that easy!
1. Subscribe to the Humble Bundle newsletter.
2. Login into your Humble Bundle account to unlock your key.
3. Redeem your key on Steam.
Claim your Valiant Dawn Full Playset Key for Spellweaver and unlock all the 351 cards from the ga...