Thank you to everybody who provides information.

bold = new deal

End date + time (UTC) - Game - Discount - Price (Germany)
2018-02-13 15:00 - Deus Ex - 85% - 1.29 EUR
2018-02-13 16:00 - Planet Nomads - 55% - 8.59 EUR
2018-02-13 17:00 - Vikings - Wolves of Midgard - 70% - 8.99 EUR
2018-02-13 18:00 - This War of Mine - 80% - 3.79 EUR
2018-02-13 19:00 - Shadowrun: Hongkong - Extended Edition - 80% - 5.09 EUR
2018-02-13 20:00 - Thief Gold - 85% - 1.29 EUR
2018-02-13 21:00 - Darkwood - 29% - 9.89 EUR
2018-02-13 22:00 - Rayman Origins - 80% - 3.39 EUR
2018-02-13 23:00 - Samorost 3 - 75% - 5.79 EUR
2018-02-14 00:00 - What Remains of Edith Finch - 30% - 14.09 EUR
2018-02-14 01:00 - Thimbleweed Park - 30% - 14.09 EUR
2018-02-14 02:00 - Stalker - Shadow of Chernobyl - 77% - 3.89 EUR
2018-02-14 03:00 - Darkwood - 29% - 9.89 EUR
2018-02-14 04:00 - Far Cry - 75% - 2.09 EUR
2018-02-14 05:00 - The Banner Saga 2: Deluxe Edition - 50% - 11.49 EUR
2018-02-14 06:00 - The Settlers - Rise Of An Empire - 80% - 3.39 EUR
2018-02-14 07:00 - Far Cry 2: Fortune's Edition - 75% - 2.09 EUR
2018-02-14 08:00 - Tropico 3 Gold Edition- 84% - 1.99 EUR
2018-02-14 09:00 - Sudden Strike Gold - 55% - 2.69 EUR
2018-02-14 10:00 - Beat Cop - 69% - 4.29 EUR
2018-02-14 11:00 - Crawl - 66% - 5.09 EUR
2018-02-14 12:00 - Bubsy: The Woolies Strike Back - 50% - 9.99 EUR
2018-02-14 13:00 - Deus Ex 2: Invisible War - 85% - 1.29 EUR
2018-02-14 14:00 - Stalker - Shadow of Chernobyl - 77% - 3.89 EUR
2018-02-14 15:00 - Tropico 5 - 80% - 3.99 EUR
2018-02-14 16:00 - Homeworld Remastered Collection - 75% - 8.09 EUR
2018-02-14 17:00 - Papers, Please - 60% - 3.39 EUR
2018-02-14 18:00 - Human Fall Flat - 55% - 5.99 EUR
2018-02-14 19:00 - Metrocide - 80 % - 2.19 EUR
2018-02-14 20:00 - Rayman 2: The Great Escape - 79% - 1.09 EUR
2018-02-14 21:00 - Kathy Rain - 80% - 2.59 EUR
2018-02-14 22:00 - Raiden V: Director's Cut - 50% - 14.99 EUR
2018-02-14 23:00 - Hyperdimension Neptunia: Re;birth 1 - 85% - 4.29 EUR
2018-02-15 00:00 - Botanicula - 79% - 2.09 EUR
2018-02-15 01:00 - Shadowrun: Hongkong - Extended Edition - 80% - 5.09 EUR
2018-02-15 02:00 - Sudden Strike 2 Gold - 55% - 2.69 EUR
2018-02-15 03:00 - Requiem: Avenging Angel - 74% - 2.19 EUR
2018-02-15 04:00 - The Flame & The Flood - 70% - 5.99 EUR
2018-02-15 05:00 - Tower 57 - 30% - 8.39 EUR
2018-02-15 06:00 - Planet Nomads - 55% - 8.59 EUR
2018-02-15 07:00 - Kathy Rain - 80% - 2.59 EUR
2018-02-15 08:00 - Deus Ex 2: Invisible War - 85% - 1.29 EUR
2018-02-15 09:00 - The Little Acre - 80% - 2.59 USD (country?)
2018-02-15 10:00 - Revenant - 79% - 1.09 EUR
2018-02-15 11:00 - Homeworld Remastered Collection - 75% - 8.09 EUR
2018-02-15 12:00 - This War of Mine - 80% - 3.79 EUR
2018-02-15 13:00 - Jazz Jackrabbit - 20% - 6.79 EUR
2018-02-15 14:00 - Shadowrun: Hongkong - Extended Edition - 80% - 5.09 EUR
2018-02-15 15:00 - Serial Cleaner - 70% - 4.49 EUR
2018-02-15 16:00 - Gorogoa - 15% - 12.79 EUR
2018-02-15 17:00 - Bubsy: The Woolies Strike Back - 50% - 9.99 EUR
2018-02-15 18:00 - Not A Hero: Global MegaLord Edition - 85% - 3.09 EUR
2018-02-15 19:00 - Deus Ex - 85% - 1.29 EUR
2018-02-15 20:00 - Icewind Dale Enhanced Edition - 80% - 3.39 EUR
2018-02-15 21:00 - Deus Ex 2: Invisible War - 85% - 1.29 EUR
2018-02-15 22:00 - Sudden Strike 4 - 60% - 19.95 EUR
2018-02-15 23:00 - Hyperdimension Neptunia: Re;birth 2 - 85% - 4.29 EUR
2018-02-16 00:00 - Shadow Warrior 2 - 65% - 16.39 EUR
2018-02-16 01:00 - Hand of Fate 2 - 15% - 23.79 EUR
2018-02-16 02:00 - Stalker - Shadow of Chernobyl - 77% - 3.89 EUR
2018-02-16 03:00 - Torchlight 2 - 75% - 4.79 EUR
2018-02-16 04:00 - Botanicula - 79% - 2.09 EUR
2018-02-16 05:00 - Tooth and Tail - 45% - 10.99 EUR
2018-02-16 06:00 - Rayman Origins - 80% - 3.39 EUR
2018-02-16 07:00 - What Remains of Edith Finch - 30% - 14.09 EUR
2018-02-16 08:00 - Darkwood - 29% - 9.89 EUR
2018-02-16 09:00 - Deus Ex - 85% - 1.29 EUR
2018-02-16 10:00 - Rayman Raving Rabbids- 79% - 1.09 EUR
2018-02-16 11:00 - Rayman 3: Hoodlum Havoc- 79% - 1.09 EUR
2018-02-16 12:00 - Thief Gold - 85% - 1.29 EUR
2018-02-16 13:00 - Hyperdimension Neptunia: Re;birth 2 - 85% - 4.29 EUR
2018-02-16 14:00 - Torchlight 2 - 75% - 4.79 EUR
2018-02-16 15:00 - Shadow Warrior 2 - 65% - 16.39 EUR
2018-02-16 16:00 - Tower 57 - 30% - 8.39 EUR
2018-02-16 17:00 - Planet Nomads - 55% - 8.59 EUR
2018-02-16 18:00 - Thimbleweed Park - 30% - 14.09 EUR
2018-02-16 19:00 - Jazz Jackrabbit - 20% - 6.79 EUR
2018-02-16 20:00 - Tropico 5 - 80% - 3.99 EUR
2018-02-16 21:00 - Far Cry 2: Fortune's Edition - 75% - 2.09 EUR
2018-02-16 22:00 - Icewind Dale Enhanced Edition - 80% - 3.39 EUR
2018-02-16 23:00 - Hyperdimension Neptunia: Re;birth 3: V Generation - 85% - 4.29 EUR
2018-02-17 00:00 - Tooth and Tail - 45% - 10.99 EUR
2018-02-17 01:00 - Hand of Fate 2 - 15% - 23.79 EUR
2018-02-17 02:00 - Not A Hero: Global MegaLord Edition - 85% - 3.09 EUR
2018-02-17 03:00 - Legacy of Kain: Blood Omen 2 - 84% - 0.79 EUR
2018-02-17 04:00 - Homeworld Remastered Collection - 75% - 8.09 EUR
2018-02-17 05:00 - Revenant - 79% - 1.09 EUR
2018-02-17 06:00 - Beat Cop - 69% - 4.29 EUR
2018-02-17 07:00 - Papers, Please - 60% - 3.39 EUR
2018-02-17 08:00 - Metrocide - 80 % - 2.19 EUR
2018-02-17 09:00 - Icewind Dale Enhanced Edition - 80% - 3.39 EUR
2018-02-17 10:00 - Gorogoa - 15% - 12.79 EUR
2018-02-17 11:00 - The Settlers - Rise Of An Empire - 80% - 3.39 EUR
2018-02-17 12:00 - Samorost 3 - 75% - 5.79 EUR
2018-02-17 14:00 - The Banner Saga 2: Deluxe Edition - 50% - 11.49 EUR
2018-02-17 14:00 - Jazz Jackrabbit - 20% - 6.79 EUR
2018-02-17 14:00 - Sudden Strike 4 - 60% - 19.95 EUR
2018-02-17 14:00 - Deus Ex - 85% - 1.29 EUR
2018-02-17 14:00 - Rayman Forever - 79% - 1.09 EUR
2018-02-17 14:00 - Hand of Fate 2 - 15% - 23.79 EUR

Note:
The full price of The Flame in the Flood decreased to $14.99 (from previous $19.99)

(I will be offline for about 3 days, thus can not update info in time.)

Planet Nomads is a good deal or this discount appears often?

It is record low in this flash sale.
https://gogdb.yepoleb.me/product/1403945378

Rayman Origins - 80% - 3.39 EUR

That's the new one and it is also an all time low for this game.

Thank you! I didn't grab it in time but this database is very useful for the next discounts.

2018-02-14 00:00 - What remains of Edith Finch - 30% - 14.09 EUR

2018-02-14 01:00 - Thimbleweed Park - 30% - 14.09 EUR

2018-02-14 02:00 - Stalker: Shadow of Chernobyl - 77% - 3.89 EUR

Next up appears to be... Darkwood? again? $10.49

2018-02-14 04:00 - Far Cry - 75% - 2.09 EUR

Thanks, explains the gap in Germany.

Huh, I wonder if they will be cycling through these deals as I'd really like to pick up Shadowrun: Hong Kong deluxe for -80%. That's a niiiiice deal.

2018-02-14 05:00 - Banner Saga 2 - Deluxe Edition - 50% - 11.49 EUR

2018-02-14 06:00 - The Settlers: Rise of an Empire - Gold Edition - 80% - 3.39 EUR