Mob Rule Classic --- 1.39€ (75% off), last time on sale in Aug.'24 and June'23

Terroir --- 0.99€ (85% off), last time on sale in May '24

Trailblazers --- 1.49€ (95% off), last time on sale in Oct.'23

Deadly Premonition: Director's Cut --- 1.19€ (95% off), last time on sale in March '24 and Sept. '23

STAR WARS Dark Forces (Classic, 1995) --- 2.09€ (65% off), last time on sale in Feb.'24

Ira --- 9.79€ (50% off), last time on sale in May '24

The White Door --- 1.69€ (50% off), last time on sale in April 24

We. The Refugees: Ticket to Europe --- 5.09€ (65% off), last time on sale in Sept. '23

Tangle Tower --- 3.39€ (80% off), last time on sale in May '24
Tangle Tower Soundtrack (dlc) --- 1.69€ (80% off), same

Edge Of Eternity 75% off, first time on sale since May 2024

along with DLCs (historically not the best deals):
Edge Of Eternity - War Nekaroo Skin 23% off
Edge Of Eternity - Goodies Pack 25% off
Edge Of Eternity - OST 25% off
Edge Of Eternity - Artbook 25% off

Digital Deluxe Edition isn't on sale this time.

Before I Forget --- 1.69€ (75% off), last time on sale in May '24 and Apr. '23

DLCs:
Golazo! 2: Qatar International Stars (dlc) --- 0.29€ (63/70% off), last time on sale in Jan. '24
Golazo! 2: Pixel Stars (dlc) --- 0.39€ (61/70% off), same

Speed Limit --- 1.99€ (80% off), last time on sale in Oct.'23

Surgeon Simulator --- 1.89€ (80% off), last time on sale in March '21

WHAT THE GOLF? --- 5.79€ (66% off), last time on sale in April '24 and Jan.'23

The Quest Deluxe Edition (pack) --- 8.59€ (43% off), hasn't been on sale since 2020 --- HOWEVER, there's no benefit over buying the base game and dlc which are regularly on sale

Airships: Conquer the Skies --- 15.79€ (25% off, was 40% before), last time on sale in May '24; currently not the best discount though
Airships: Conquer the Skies - Soundtrack (dlc) --- 6.19€ (25% off, was 40% before), last time on sale in Oct.'23; currently not the best discount though
Airships: Heroes and Villains (dlc) --- 6.66€ (25% off, was 20% before), last time on sale in May '24

doubled, sry.
EDIT:
Not to waste space I think this one is worth noting:
Spectacular Sparky 80% off, it was on sale recently but with much smaller discount while -80% label hasn;t been seen since last year winter sale.