Factorio: 2344
Path of Exile: 2736
Rimworld: 2191
Kerbal Space Program: 1071
I have a bunch of honorable mentions in the several hundred hours ranges that are only not 1k+ because I have severe ADHD and something else became a hyperfocus before they hit that point:
Backpack Hero
Ark
The Last Spell
Timberborn
Factory Town
Dyson Sphere Program
Loop Hero
Brotato
Satisfactory
Path of Achra
Against the Storm
Desynced
Honestly, I had it all with line breaks, but it didn’t take. I will fix.