The prices for both games are at an all-time low according to ITAD.
https://www.gog.com/game/grim_dawn
https://www.gog.com/game/torment_tides_of_numenera
Other games at 75% off:
Dragon Age™: Origins - Ultimate Edition
This War of Mine: Soundtrack Edition
Tyranny - Commander Edition
Vampire: The Masquerade - Redemption
Vampire®: The Masquerade - Bloodlines™
If you use code "GOGWENT50" you can get the following games at 50% off:
Absolver
Banner Saga
Banner Saga 2
Battle Brothers
Battle Chasers: Nightwar
Dragon's Dogma: Dark Arisen
Dying Light: The Following – Enhanced Edition
Little Nightmares
Pillars of Eternity: Definitive Edition
Pyre - Historical Low
Ruiner
Shadow Tactics: Blades of the Shogun
The Legend of Heroes: Trails of Cold Steel
Enjoy.
For some reason I can't enter the code anywhere on that page/checkout, but it works fine by going here and entering either of them - https://www.gog.com/redeem
Also get $2.18 back in GoG funds for Torment (because of screwy Australian pricing)