Factorio alien biter It seems the small medium large and behemoth all use the same model just scaled differently/colored

i tried different orientations and just printing its feet down seemed to work but the legs are delicate at small scales

Might also give the Spitter/worm a shot

check out the spawner too https://www.thingiverse.com/thing:3419170

There was apparently a 404 error trying to download it should be fixed now 8/18/2020

Added a small biter that should print much nicer on FDM printers at a smaller size