Rock Raiders HQ (4990)

1999's Rock Raiders theme was weird and cool, with loads of bricks in turquoise, unusual new parts, and of course, a rock monster. The premise was also very unique: the Rock Raiders were astronauts who crashed on an alien planet and had to harvest energy crystals to fix their ship. The Rock Raiders HQ was an incredible and modular playset; the four main sections could be swapped around in any order you liked. The sections also interacted with each other; you could pick up a rock with the crane, move it to the small laser, cut it open and remove the crystal inside, use the crane to move it to the dumper, then dump it into the truck.

I tried to maintain these functions. The sections are on 4x4 Mario bases, so they can be removed easily and switched. The crane can be raised or lowered depending on the position of the grey mechanism. The dumper lies at an angle that can hold a 1x1 rock until pushed forward, at which point the dumper goes off of a 2x2 curved slope and drops the rock.