You can get the latest update of this pack for free here.
The pack contains over 70 prefabs of different modules, that will allow you to create numerous combinations of ready to fight mechs. The robots are extremely easy to assemble - just drop the parts into the corresponding containers and they'll snap right into place. The poly count of units varies from 2.3k to 4.2k tris. The textures vary from hand painted 4k diffuse atlas, which looks good even unlit, to the set of PBR maps. All the mechs in the pack have humanoid avatars.