I've been looking for this game for years, without being able to find it.
The game was a tower defense set on foreign planets. There were various missions, each of which featured a map.
I remember well that there were machines that collected crystals. These machines moved from your base to the crystals. If I remember correctly these machines were yellow (the crystals were blue).
Crystals were the "currency" of the game and could be used to upgrade or buy things. It was necessary to build towers (or something similar) that fired at waves of enemies.
I was playing this game before 2013 I think.
I would be really grateful if you help me. It is a memory of when I was a child and it would be really nice to find it again.
thank you for the answer! Unfortunately that wasn't the game, the graphics were much simpler.
I've been looking for some time in the categories you indicate, but I can't find it (there are so many games on this site)
