Indiegala:
Region locked game
it will only work in the region from where it is bought
This game is provided via Steam key. For key redemption a free steam account is required.
CDKeys:
Yes, excluding the bonus game cheaper USD $23.09 (Before 5% FB Coupon) at CDKeys if you don't pay by Coinbase.
FB 5% (Credit to BA's Link):
Note: Don't want to use FB or Email . Just Use this link for 5% Discount Code click send WITHOUT entering email id. You will get code which you can use twice/account . Make sure you login to CDkeys for coupon code to work :)