@some_lame_kid said:
If anyone has tips on 3D modeling practices to optimize a game for the lowest of low end hardware(64-bit), I'd appreciate it.
Depends on what style you are aiming for. Imphenzia is good for a blocky look, but if you want your low-poly not to be obvious I'd recommend looking at Grant Abbit's work, and in particular look at sculpting and baking from high to low poly using multiresolution modifiers.
Also, highly recommend this blender plugin (not free), as a huge amount of the detail can be driven by and baked into textures. Doing this without the addon is possible, but far more painful.
Geometry on the left, middle and right are driven by textures
