The original stompy type, aka Mechagiras (Mechabonica), “unnamed elephant type” (OAR), or Protozoid (OER). I had one of these when I was a youngin’, and used to detach the head and make an escape ship (the ears were good wings).
The first mantis type. It has an interesting walking mechanism: the legs are mainly decoration, and the real work is done by some stubs directly under the body. In bad news, the front section droops with age, doh!