Each of these walkers has a specific task on the battlefield.
AT-AA The all terrain anti aircraft walker gives cover to the ground forces from in atmosphere craft. It's quad heavy laser guns have also been used to great affect on ground based targets. It has twin blasters for local defence.
AT-AV The all terrain assault vehicle is a heavily armoured weapons platform. It's armament consists of two heavy laser cannons and two medium laser cannons.
AT-AV/Co The all terrain assault vehicle/command is a front line command and communications unit controlling the assault groups attack and the support fire from the rear. It's armament is the same as the AT-AV.
AT-HC The all terrain heavy cannon is an extra heavily armoured walker which carries a super heavy cannon for the destruction of defences and armoured vehicles. It also sports twin light blasters for local defence.
AT-PT The all terrain personal transport is used to scout building and tight spaces. As seen here it is also used to support infantry. It's armament is a blaster cannon and a grenade launcher.
AT-RV The all terrain recovery vehicle is a vital component in any mechanised unit. It's large crane can upright the largest biped in the group and it carries the mechanics and equipment to maintain walkers in the field. It's weapons are twin light blasters and a top mounted laser cannon for local defence.
AT-ST/As The all terrain scout transport/assault is a variant on the AT-ST, it has longer legs and is more nimble. It's weapons are superior with twin heavy cannons (chin), a light cannon and a grenade launcher.
These are really good, I love the AT Machines. I thought there was a four-legged low-lying AT for fighting enemy aircraft, I saw it in Force Commander. And your AT-PT is AWESOME.
Could a few people review my stuff?
this is a brilliant collection of walkers, some of which are clearly your own design and some that are from the films and games.
the only thing i think i should point out is that there is already an ataa. if you have starwars galactic battle grounds, its one of the imperial walkers with four legs.
Good job! I like the AT-PT. There are some other neat and creative ideas here too, but I don't like the fact that you often used the official AT-ST set as a base. IMHO, the official AT-ST set is just about the worst LEGO AT-ST I've ever seen. Also, I hate to break it to you, but the AT-AA is actually a Star Wars unit already. It was first introduced in the game Force Commander. It has four legs and walks like a crocodile. But anyway, these are pretty cool overall. Good job.