I ´d recommend Aquanox and Aquanox 2 taking advantage of what both are in a New Historical low (-90 %):

Aquanox 0,49 €
Aquanox 2: Revelation 0,49 €

Immortal Redneck also seems like a historical low. Don't remember seeing it at -90%

Some very decent discounts overall in this sale. Might fill some holes and re-buy games I already have in some other form.

• $0.59 • -90% • AquaNox
• $0.59 • -90% • AquaNox 2: Revelation
• $0.65 • -88% • Alien Shooter + Expansions
• $0.89 • -85% • Shadowgrounds
• $0.89 • -85% • Shadowgrounds Survivor
• $0.99 • -80% • Ring Runner: Flight of the Sages
• $1.49 • -75% • Eradicator
• $1.49 • -75% • Freedom Force
• $1.49 • -75% • Freedom Force vs. the 3rd Reich
• $1.49 • -75% • Redline
• $1.49 • -90% • Rise of the Triad (2013)
• $1.49 • -75% • Rise of the Triad: Dark War
• $1.79 • -70% • Expendable
• $1.79 • -70% • Incoming + Incoming Forces
• $1.79 • -70% • Mobile Forces
• $1.79 • -70% • Nosferatu: Wrath of Malachi
• $1.97 • -67% • Hidden and Dangerous Action Pack
• $1.99 • -60% • Devil Daggers
• $1.99 • -80% • F.E.A.R. Platinum
• $1.99 • -90% • Immortal Redneck
• $1.99 • -80% • Sine Mora EX
• $2.39 • -60% • Blake Stone: Aliens of Gold
• $2.39 • -60% • Blake Stone: Planet Strike
• $2.39 • -60% • Blood 2: The Blood Group
• $2.39 • -60% • Independence War 2: Edge of Chaos
• $2.49 • -75% • Paranautical Activity Deluxe Atonement Edition
• $2.49 • -75% • The Suffering
• $2.49 • -75% • The Suffering: Ties That Bind
• $2.99 • -50% • Warhammer 40,000: Fire Warrior
• $2.99 • -50% • Zombie Shooter
• $2.99 • -50% • Zombie Shooter 2
• $3.29 • -67% • Hidden and Dangerous 2: Courage Under Fire
• $3.59 • -40% • Chaser
• $3.74 • -75% • F.E.A.R. 2: Project Origin + Reborn
• $4.01 • -33% • Catacombs Pack
• $4.19 • -30% • Parkan: The Imperial Chronicles
• $4.79 • -20% • EPIC + Inferno Bundle
• $4.99 • -75% • Nex Machina
• $5.09 • -66% • JYDGE
• $5.09 • -66% • Neon Chrome
• $5.09 • -70% • Subterrain
• $6.59 • -67% • BioShock 2 Remastered
• $6.59 • -67% • BioShock Remastered
• $6.79 • -66% • Neon Chrome Deluxe Edition
• $7.49 • -50% • Hellmut: The Badass from Hell
• $8.49 • -50% • Blazing Chrome
• $8.49 • -15% • Stranglehold
• $9.99 • -50% • SYNTHETIK: Legion Rising
• $12.49 • -50% • ECHO
• $13.74 • -75% • BioShock Infinite Complete Edition
• $13.99 • -30% • Tokyo 42
• $14.99 • -25% • Xeno Crisis
• $16.74 • -33% • Ion Fury

Thanks a lot for the -90% on Immortal Redneck :)

Immortal Redneck is $2.36 in here .

Yes, best I've seen before was 80% off.

Ion Fury might be the best first person shooter ever. Seriously, try it if you can!

Sadly there are not many games left without regional pricing. And the amount is constantly increasing, 20 to 30% on top of the US price are more the rule than the exception for me now and some games already have passed the 50%. It more and more keeps me away from buying games and makes me waiting for high discounts like the 90% on Immortal Redneck.

Exactly. I also wait for discounts on anything digital because of this. For me, it is usually about 17-18% more than the US price. There are still some games that have the same price across the board but those are exceptions rather than the norm. And definitely nothing new-ish.

So in the previous sale Archimedean Dynasty was discounted very very low and current sales Aquanox is less than a dollar. It felt like the GOG want to tell me to jump into my submarine and start blasting.

Yes, I would also like to see the last part of FEAR here. I never had the chance, to play it in the past, however, I was watching some gameplay and found it very interesting, no matter, what the negative reviews say.

The multiplayer part is not a problem, since many games here are sold without it. Like the Bioshock series.

Added:
• $1.49 • -75% • FireStarter
• $1.79 • -70% • Venom. Codename: Outbreak
• $4.20 • -65% • Project Warlock
• $10.79 • -55% • WARSAW

"Neon Chrome (-66%) is a thrilling top-down shooter with procedurally generated levels and a destructible environment. Tackle it alone or alongside up to 4 friends in co-op mode."
The same up to 4 friends as with Project Eden?