GOG "Spot the Difference" Discounts Winter Sale 2020

[Deozaan]

As part of their Winter Sale, GOG have sent out a newsletter with a little puzzle: Spot the 7 differences between the images to get discounts on games.

Play for yourself with the link above, or save yourself time by clicking the spoiler below.

I spotted the differences, here are the discounts, which all expire Dec 23, 2020, 6:59 AM (not sure which time zone):

Spoiler (click to show/hide)

https://www.gog.com/redeem/8BJRH5V95YT8VBDWH4
90% Off:
Syberia
Syberia 2
Syberia 3


https://www.gog.com/redeem/4R2NBGREHZIXBM3QYB
85% Off:
Banner Saga
Cat Quest


https://www.gog.com/redeem/KTGK68AXZFYM7ZCV6B
80% Off:
Overlord 2
Jazz Jackrabbit Collection
The Incredible Machine Mega Pack


https://www.gog.com/redeem/BJYCPSTZ4S8B7PR4DS
75% Off:
Slime Rancher
This War of Mine
Summer & Winter: Olympic Challenge


https://www.gog.com/redeem/5YLL9M3DP23PLYO0K5
55% Off:
Costume Quest
Icewind Dale Enhanced Edition
Starbound
Space Pirates and Zombies (SPAZ)
FAR: Lone Sails


https://www.gog.com/redeem/Z2CVZWFX201VO2U0Z3
35% Off:
Heart of the Woods


https://www.gog.com/redeem/YBBJAK0LAS73RDRQE5
30% Off:
Cthulhu Saves Christmas

[wraith808]

thanks for doing all the hard work! 

[Deozaan]

They also sent me another email with an "exclusive" discount on Konami games, which expires in about 2.5 days from the time of this post:

https://gog.com/redeem/BTXZ0DTKCNUP9RZFO3
20% Off:
Silent Hill 4
Metal Gear
Metal Gear Solid
Metal Gear Solid 2 Substance
Konami Collector Series: Castlevania & Contra (Castlevania 1, 2, and 3, as well as Contra and Super C)

thanks for doing all the hard work! 

I spotted six of them fairly quickly from randomly glancing around the images, but the final one required some strategy.