• Moonstone Island Decorator's Bundle – from $32.35 to $35.94 (+11%)

Sorry for the late comment on this. Thanks for the context. Good to know. It's a nice piece of dry humour. It wasn't explicitly stated in the OP though (even though it was humorous). Which is fine, it obviously wasn't required for GOG users at the time, but it's not super-clear for anyone who signed up post-April 2015. Thanks again for the history lesson!

• Enclave - Digital Deluxe Content – from $1.99 to $3.99 (+100%)
• Enclave – from $4.99 to $9.99 (+100%)
• Enclave - Digital Deluxe Version – from $7.97 to $15.17 (+90%)
• Enclave - Soundtrack – from $2.99 to $4.99 (+67%)
• Jack Orlando: A Cinematic Adventure - Director's Cut – from $4.99 to $6.99 (+40%)
• Robo Rumble – from $5.99 to $7.99 (+33%)

• Shoot'em Up Bundle – from $26.98 to $18.89 (-30%)
• Time for Adventure Bundle – from $50.97 to $35.68 (-30%)
• Talisman: Digital Edition – from $6.99 to $0.0 (-100%)

Response to the issue: "Upon consultation I can confirm that the lowest price is not calculated based on the saved %, but the lowest amount is actually stored on our side. In case of Arkanoid, there must have been a temporary bug (connected with a promo setup), which we are sadly unable to reproduce at this time"

• Old World: Complete – from $78.16 to $75.95 (-3%)
• Lifeless Planet Premier Edition – from $19.99 to $14.99 (-25%)
• 2064: Read Only Memories – from $19.99 to $9.99 (-50%)

• Earth 2140 Trilogy – from $4.99 to $6.99 (+40%)

• Goalgetter – from $29.99 to $39.99 (+33%)

• The Complete Movie Games Collection – from $99.99 to $89.99 (-10%)

I'd buy that for a dollar! =)

• Talisman: Digital Edition – from $0.0 to $6.99 (+inf%)
• The Fantastic Kitty Rue – from $5.99 to $11.99 (+100%)
• 2064: Read Only Memories – from $9.99 to $19.99 (+100%)
• Howl – from $9.99 to $14.99 (+50%)
• Lifeless Planet Premier Edition – from $14.99 to $19.99 (+33%)
• The Complete Movie Games Collection – from $89.99 to $99.99 (+11%)

• Klabater Franchise Bundle – from $39.99 to $37.48 (-6%)
• Moonstone Island Decorator's Bundle – from $35.94 to $32.35 (-10%)
• Jagged Alliance 2 Classic Deluxe – from $20.97 to $17.99 (-14%)
• Wizardry: Proving Grounds of the Mad Overlord – from $34.99 to $29.99 (-14%)
• Jagged Alliance 2 - Deutsches Lösungsbuch (German Strategy Guide) – from $5.99 to $4.99 (-17%)
• Jagged Alliance 2: Wildfire - Digital Deluxe Content – from $5.99 to $4.99 (-17%)
• Jagged Alliance 2: Wildfire - Soundtrack – from $5.99 to $4.99 (-17%)
• Jagged Alliance 2: Wildfire – from $8.99 to $6.99 (-22%)
• Turmoil – from $12.99 to $9.99 (-23%)
• Dreadful River – from $19.99 to $14.99 (-25%)
• LEGO Batman: The Videogame – from $19.99 to $14.99 (-25%)
• Robo Rumble – from $7.99 to $5.99 (-25%)
• A Castle Full of Cats – from $3.99 to $2.99 (-25%)
• Earth 2140 Trilogy – from $6.99 to $4.99 (-29%)
• Jack Orlando: A Cinematic Adventure - Director's Cut – from $6.99 to $4.99 (-29%)
• Knights and Merchants Digital Deluxe – from $6.99 to $4.99 (-29%)
• Earth 2150 Trilogy – from $9.99 to $6.99 (-30%)
• Knights and Merchants – from $9.99 to $6.99 (-30%)
• Septerra Core: Legacy of the Creator – from $7.99 to $4.99 (-38%)
• Septerra Core: Legacy of the Creator - Digital Deluxe Edition with Soundtrack – from $12.58 to $7.67 (-39%)
• Enclave - Soundtrack – from $4.99 to $2.99 (-40%)
• Septerra Core: Legacy of the Creator - Digital Deluxe Content – from $4.99 to $2.99 (-40%)
• Septerra Core: Legacy of the Creator - Soundtrack – from $4.99 to $2.99 (-40%)
• Enclave - Digital Deluxe Version – from $15.17 to $7.97 (-47%)
• Earth 2160 – from $9.99 to $4.99 (-50%)
• Enclave – from $9.99 to $4.99 (-50%)
• Enclave - Digital Deluxe Content – from $3.99 to $1.99 (-50%)

So first make the prices explode, then bring them back down just over a month later, incidentally the amount of time that's tracked by the lowest price notice. Heh...

Was this a database error, some electronic blip, that reverted prices for a short time?
Because I don't see these changes anymore...

Talisman is free again
TopWare's games are back to their raised prices...

Could it be that you witnessed a database rollback on GOG's side? That they had to load a backup from like a month ago (with old/ outdated prices)? Because those price changes mirrored every previous price reduction (or increase) you documented before.

What about checking game prices? I already checked and a lot of games that are in the store have better price tags in other stores like Steam, Epic Games store, and even Ubisoft store. I thing gog needs to make prices fair for all countries.

• Achilles: Legends Untold - Soundtrack Bundle – from $17.38 to $26.08 (+50%)
• A Castle Full of Cats – from $2.99 to $3.99 (+33%)
• LEGO Batman: The Videogame – from $14.99 to $19.99 (+33%)
• Turmoil – from $9.99 to $12.99 (+30%)

• ABRISS - build to destroy – from $19.99 to $14.99 (-25%)
• Howl – from $14.99 to $9.99 (-33%)