S.T.A.L.K.E.R. 2: Heart of Chornobyl

This was bugged prior to the 1.1 patch, but works fine as of 19th December 2024. To unlock it you need to visit all 22 areas of the map long enough for the "New Region" popup to display.

• Burnt Forest
• Cement Factory
• Chemical Plant
• CNPP
• Cooling Towers
• Cordon
• Duga
• Garbage
• Generators
• Iron Forest
• Jupiter
• Lesser Zone
• Malachite
• Prypiat
• Red Forest
• Rostok
• SIRCAA
• Swamps
• Wild Island
• Yaniv
• Yantar
• Zaton

Playing normally, you'll only be able to access Generators as part of the end-game, so make sure you have the other 21 areas unlocked before completing the final missions in Prypiat.

Map of 21 Zones

The achievement should unlock shortly after entering the Generators zone. It is possible to use a glitch to enter Generators earlier by hopping on a bus near to Zustrich Canteen in Prypiat if you want to try unlocking the achievement without finishing the game.

You can't currently enter the Iron Forest and CNPP zones due to lethal radiation levels (these are presumably locked for future content), but you can get near enough to unlock the zone if you're careful.

Most of the areas will be visited as part of the main story, though you may need to make a dedicated trip to unlock some. I missed these four during my initial playthrough:

Cement Factory and Cooling Towers.
Fast travel to Slag Heap, head East past the Dig Site and Reloading Point, then follow the road North to the Cement Factory. Keep heading North across the bridge to unlock Cooling Towers.

Iron Forest
Fast travel to Slag Heap, head West then follow the road North to Iron Forest Gate, that should unlock the zone. If not, try following the wall until it does, but watch your radiation levels, since they can quickly reach lethal levels.

CNPP
Fast travel to Yaniv Station, exit via the Eastern door, then follow the train tracks East until they pass under the Bridge of Death. You'll get high radiation warnings, but CNPP should pop up as a new area notification as you pass between two trains just East of the Bridge.

The Four Winds seems to be bugged at the moment. Unlocking every region, including the currently inaccessible ones does not trigger the achievement. It's unclear whether this is intentional or something that will be fixed in a future patch. Last region (Generators) unlock mission "Eye of the Storm"