(Disclosure: This site contains product affiliate links. We may receive a commission if you make a purchase after clicking on one of these links. Read our affiliate disclosure for more info.)
The devs for Nuclear Throne are rewarding all early access purchasers on Steam one free giftable copy of the game on January 1st. See more details here.
Current price of the game is $12.99. However if you wait until it’s out of early access the price will be $11.99 according to the Steam page. They do say the game will be in Early Access until it’s done (which could mean anything).
If you purchase the game via the Humble Widget on the Nuclear Throne homepage you will get a DRM-Free copy and 90% off the purchase price goes to the devs.