Games that were graphically impressive for their time, but are ugly now.

[Leynos]

I think about any 3D vertical Shmup from the DC era still looks great TBH. Zero Gunner 2. Giga Wing 2. Psyvariar 2. REZ and esp Ikaruga. In fact, the Shmup sections and ship designs in Nier Automata were inspired by Ikaruga.