Yesterday also GOG started a sale: the so called Black Friday (and Cyber Monday) Sale!

500+ deals up to 90% off

Deals? Deals! Yes, that's right – deals. It's Black Friday and Cyber Monday sale time on GOG.COM – the DRM-free dispensary of exceptional value.
The sale will take place between November 21–27, and it is pure unadulterated savings so let's cut to the chase...
Beloved good old games only on GOG.COM:

• Soldier of Fortune (-20%)
• Soldier of Fortune: Payback (-20%)
• Soldier of Fortune II (-20%)
• SWAT 4 (-50%)
75% off, the sweet spot between big deals and the most wonderful games in history includes:
• Vampire: The Masquerade – Bloodlines
• Zeus + Poseidon (Acropolis)
• Crysis
• Dragon Age: Origins
• Theme Hospital and Theme Park
• SimCity 2000, SimCity 3000, and SimCity 4
• Worms: Armageddon, Worms World Party Remastered
• the complete Wing Commander and Ultima anthologies
• The Saboteur
• SPORE
• Jade Empire
• Dead Space

Black Friday is still about the biggest savings and a chance to grab Panzer Corps (-90%) – the spiritual successor to the classic Panzer General series, the musical BIT.TRIP games (-80–90%), or the must-play Mafia II (-80%) and Hyperdimension Neptunia Re;Birth trilogy (-80%).

Deals will be available until November 27, 11 PM UTC.