Like for the Epic Games Sale, does GOG have anything interesting? Not really. BattleTech maybe.

BattleTech ($8.50)

Flashpoint DLC ($8.50)
Urban Warfare DLC ($8.50)
Heavy Metal DLC ($8.50)

Season Pass ($21.50) - Contains Flashpoint, Urban Warfare, Heavy Metal DLCs @ $7.12

Mercenary Collection ($38.50)
BattleTech ($8.50)
Digital Deluxe Content ($2.75)
Season Pass ($21.50) @ $27.25

So best price is BattleTech ($8.50) + Season Pass ($21.50) for $30.

You know, I think I will buy this.