Patient Gamers

Doom (2016), Doom Eternal, Helldivers 2, Broforce

I'm enjoying Railway Empire. It's on for 75% off the base game and pretty good deal for the entire DLC & Japan collections.

If you love time-wasters with some challenges, then I'd recommend it.

Lingo ($6.99/$9.99) is an incredible exploration and word puzzle game. It also has a few excellent custom maps such as Duolingo and Liduongo.

A sequel (Lingo 2 $9.99) just released and is also excellent. It changes how puzzle rules are presented, making them playable in either order. It's a more polished experience though, so playing the first game after would probably feel like a step backward.

Caves of Qud has a small discount. I’ve been playing it a lot lately on the Steam Deck.

Anno 1800 is 5 bucks. I love it, but you need to deal with Uplay as well

Here is a link to Steam DB showing popular games more than 50% off:
https://steamdb.info/sales/?min_discount=50&min_rating=70&min_reviews=500

I just bought Suicide Squad (I know, I know, but it was on sale and I want to experience it at least a little); Pine; and Sniper Elite 2R, 3 and 4.

I'm very excited to get into the Sniper Elite games. I played 5 back when I had Game Pass, but never finished. I figured the others might be just as good.

Borderlands 3, if you somehow missed it, for under £5 is just a good value.