Humble Bundle offers Steam downloads of Sid Meier's Civilization VI for Windows, Mac, and Linux bundled with two DLC Packs for $12 when you sign up for the Humble Monthly Subscription Box. That's a $45 savings on this game and DLC alone. Each month, the Humble Monthly Subscription Box includes a selection of games valued at over $100. (You'll receive additional games after this deal ends on February 2.) Those who subscribed last month received nine games, including Tomb Raider, Quantum Break, and The Long Dark. Subscribers also get 10% off Humble Store purchases.

Note: You can cancel the subscription at any time. Even if you do cancel, each game is yours to keep. Most games are compatible with Windows, and some games may also be compatible with Mac and Linux.