Cat Quest II - not a very long game, but not a very fun game to complete. Maybe I was doing something wrong, cause everybody I know did it in half my time. By far the biggest disappointment for a co-op game from a co-op bundle was that it was only local co-op.

Thief Simulator - another one of the janky simulator games. Most of the achievements are tied to reaching milestones or stealing specific things. Some missable achievements for Halloween and Christmas, but those can be gotten by changing your computer's date and time too. Took me 25 hours.

But why

Rainbow Six Siege - revisited this after about 7 years (last played back during Outbreak), and it honestly wasn't too bad. Half of the achievements were already unlocked, and the rest were either grinding specific kill circumstances or playing as all the original operators. Meat Wall sucked though.

TRANSMASC ICON!

Adios - short and sweet story about a pig farmer and a mob hitman. The game is separated into different scenes, most of which have their own missable achievements. They are by no means hard to get, but should you miss any, there are scene reset / select features. Took me just short of two hours.

Order 13 - fun enough gameplay loop, but the horror aspects detract from it. The monsters are big-headed naked guys and more of a nuisance that cuts into your limited time rather than scary. A lot of missable "Complete game without x item" or grindy achievements, but still beaten within 10 hours.