Neckbreak

NOTE: This is earned by the early access video but the fully released version as people stated made the early access obsolete but not fully.
Project Downfall full game [05] Ending E (2021 Early Access) by dummyprotocol
Going Places 22:54
Passing Through(get the letter instead of heading to the container) 26:21
Going Places(re-visit) 31:12
Memory Lane 32:43
The Old Capitol 33:34

Warsaw

Ending E (early access) is where you should be doing this achievement, just follow the video guide which is all in the Ending section. After this, feel free to either start new save slot or continue.

Out the frying pan...

Get to the Lucos club in central Warsaw
Complete The Old Capitol.

Once you did them, consider you can either continue the game or start a new save.