Apocalyptic piano music

It plays in the background at this video 12:50, it has some piano tunes. (In the description there's a link with all the songs that were used on the video, but for some reason, this specific one cannot be found on the list.)
It also was on a specific Roblox zombie game I used to play back then, it plays around 2:30
Searched for it a ton but couldn't find it, so I came here to ask