Does anyone remember the video game?

As mentioned above I'm looking for a game that I played about 2-5 years ago (was the beta at that time). It was built like Minecraft with the construction methods, the blocks, etc.

The way I remember you started the game on a flying island and had to do a mission to a temple there. Then you could go to a kind of hangout online with other games.

I think the whole thing is only available for the PC and was never released on consoles.

I would be happy if someone could still remember it and happened to know the name.

Never played but you might mean Portal Knights

Unfortunately no, unfortunately I don't know whether the game has ever really been released or edited.

I think it was still unpublished.

Trove?!

Hmm cubeworld would come to my mind