Trying to remember a game. a multiplayer game with an actual limited lifespan

I remember watching a review for that game, it had something to do with lanterns or similar, didn't it?

The game you are thinking of is The Flock.

Kholat is a single player, open world, walking simulator. I enjoyed the atmosphere and exploration of Kholat, but the story wasn't explained well and was left open to interpretation which I don't like.

Edit: It looks like The Flock is dead. This is from the game description on the Steam page:

Unfortunately the game didn't do well enough for the population to decrease in any way worth mentioning. Vogelsap ran out of money a long time ago, and therefore the server that keeps track of the population run out too. We said we would rather go down then change our philosophy for this game. Well.. it became the first thing; we went down