This set was one of the smaller ones out the orginal blacktrons, yet it still has the intimidating blacktron feel. The black minifigures are designed very nicely and look very futuristic. i like how this one looks like a hovercraft designed to travel small distances. Buy if you find it online!

Lego's 'walking machines' are usually good, and this one is a classic amongst smaller space sets. With its well-thought-out design, its legs can be moved in a 'walking' motion. Other features include a cockpit which detaches to form a spacecraft and a back which lifts up to reveal tools. With its dramatic Blacktron colour scheme, it looks great.

The Alienator is the smallest Blacktron set, and it is a very nice one.

The legs of the vehicle can slide back and forth to simulate walking. The mechanism works pretty well and has been imitated in several Space sets (And in other sets) since.

In the back of the vehicle is a small compartment made up of two corner walls usually seen in Castle sets. The compartment opens to reveal two tools: A yellow laser gun, and a yellow wrench. Both of these elements are hard to find in yellow.

The figure included is a Blacktron figure like any other, completely suited in black. The design on the torso is one of the nicer minifig torso designs I've seen.

This is a real classic among Space sets. No Space collector should pass this set up!

The Blacktrons are really a nice serie of the lego and this one was my first of them (and my only Blacktron set when i was a child). Now i got the other sets but this one still have a particular place for me.
Overall, he looks good, has a cool fig and i love this kind of walker like 6940,6882 or 6878.

I really like the design of the colors (black/yellow) and how it looks like a AT-AT walker from Star Wars.
Another thing: the cockpit with the canopy can be seperated from the body with the feet.
I also remember that it is possible to put the whole mini figure into the hidden compartment in the back.