I've been looking forward to this one, especially since it's open world and set in the UK's lake district
It's available for preload on Gamepass or pre-order on Steam (if anyone does the pre-order thing any more)...release date 27th of March, playable 3 days earlier if you buy or order the deluxe edition. I generally like Rebellion Games stuff; Sniper Elite franchise and all that, so being an open world post nuclear apocalypse title from them, I'll more than likely pre-order Atomfall on that basis.
From what I've seen after following the development for a bit, it's akin to Stalker 2 with bits of Fallout 4 set in the lake district around the Windscale nuclear power station, not quite the UK's version of Chernobyl in 1957...but could have been.