A segmented monster from the dawn of 3d characters in games (c1998).
Although it is a working file (this monster and others were canned when the game it was intended for was reinvented) and 10 years old, I still quite like it.
At around 600 polys(triangles) it was breaking the bank in a world filled with 160 poly humans.

All work by Lachlan Creagh.