Fallout 4 - Absolutely loved this game a couple of years ago, turned sanctuary into a fortress. Had to stop playing in the end as the settlement was too big and it kept glitching. I don't think there was a set of Power Armour I didn't own.
Fallout 4 was the reason why I upgraded every part of my PC apart from the sound card and the drives. I have it modded for construction. Height limit removed, thousands of extra building items and, most importantly of all, the Place Everywhere mod. Absolute game-changer, that mod. All in all, I had dozens of building-related mods installed. I spent many hours scavving because I decided that I would acquire everything I needed for the building ingame. No free building, no resource-increasing mods, no console commands to summon resources. Also, no framerate

It dropped under 10 fps in the settlement I was working on at the time. I think 4fps was the lowest I saw. Somewhere around that. That wasn't even Sanctuary, which would have been the biggest settlement. I turned that into a walled city, but it was the first settlement I worked on and it wasn't very complex. It was Starlight that prompted the upgrade. I'd turned it into a trading hub city, with a theatre, a library, a hospital, a tavern, an inn, a rooftop restaurant (called, unsurprisingly, Starlight), a laundrette (fully functional - one mod I installed created working washing machines) and, the main framerate tank, a block of flats. 36 sizeable flats, each one fully furnished and individually decorated. Do It Yourshelf and Creative Clutter mods are the dog's danglies for decorating Fallout 4 settlements.
I never did finish Starlight. I kept switching between my settlements (~30, IIRC) roleplaying as a benevolent but slightly unhinged dictator. So I'd improve the living standards for all my
devoted followers settlers. Plus, of course, work on the massive museum and monument to myself in Sanctuary. In between slaughtering hordes of gunners to acquire enough combat armour and rifles to equip every one of my settlers and have enough spares to equip an army. Maybe more than slightly unhinged.
The last game I completed was Dead State Reanimated, which I'd give a solid 8/10. Looks very dated. Badly optimised. Buggy enough to have CTDs. Combat is very slow if there are more than a few enemies in the area as the game slowly churns through a turn for every one of them, including seconds of animation for enemies not even within view. But a very good game nonetheless.