As you may know, 4th of July is the last day of the Steam Summer Sale.
If you are planning to pickup Subterrain, it's the last chance at 50% off during this sale run!
Just for the information, Subterrain will NOT be in any bundles this year, or probably next year. (Or probably never)
Also 50% will be the lowest it will be on Steam this year.
Cheers!