Space Ships for the game Transcendence

[Dimitri]

'Not sure what else I can do besides smoothing, adding more polygons (not that the number of polygons even matters, since the model will be pre-rendered into a sprite sheet for the game).'

It is a matter of topology. Try another way of constructing the initial-control mesh. Usually such problems arise from the way the mesh is organized from its very first steps. It needs some experience regarding the peculiarities of the subdivision modelling route. After experimenting a little bit you will find the proper solution, for sure. : - )