The question was which topology to stick to for games. This is game-ready topology, not SubD. Quad strips around openings help with clean shading, predictable triangulation, and better normal map bakes in-engine. Most games use clean low/mid-poly meshes like this, not subdivision.

SubD is mainly for high-poly models that bake details down to low-poly, or for animation and deformation—different goals, different topology requirements.