Hydra inspired by Starcraft. Originally made in Sculptris, then cleaned up in Blender. Contains both Low poly and High poly models. Low poly model might not be perfectly symmetrical, but it isn't noticeable. No textures, not rigged.
Low poly model: 2190 vert
High poly: 28000
Contains a crease where eyes and mouth should go. No Quads, all triangles (because of import).
So not very professional, but I liked it, so I thought about sharing it. (There's definitely room for improvement.)
A newer version is available, it's also called Hydra.