We need to go deeper

Control: The Foundation adds lore and mechanics to the base game, but they fit Control's mold so well, that I'd really call The Foundation "more of the same." In a good way!

More strange and imaginative environments, including the tried-and-true like haunted offices, but also new cavern spaces that showcase late-game mobility powers.

More bizarre and ominous story beats and backstory collectibles, building on your previous interactions with the astral plane, but also shedding new light on the history of the Bureau and The Oldest House.

More paranormal gameplay mechanics, which don't overshadow your existing powers, but set up some exciting new navigation and combat challenges.

(More weapon mod types, which I could've done without, since none of their esoteric benefits were better than my already-optimized loadout.)

And it's got a substantial amount of content, filling a fairly hefty sub-map with story objectives and optional side-missions.

The Foundation ticks all the same boxes as Control's main game, without feeling overly familiar.

Better than: Batman: Arkham Origins - Cold, Cold Heart, Horizon Zero Dawn: The Frozen Wilds
Not as good as: The Witcher 3: Wild Hunt - Hearts of Stone
The "Swift Platform" side mission may not top the Ashtray Maze: but it comes impressively close.

Progress: Finished all the main and side missions.