Simply BattleZone. Strategy and shooter in one package, I felt like I was playing Red Alert in 3D and form first person perspective. True innovation forgotten and tossed away. Of course the gameplay wasn't exactly right, but they improved some of that with BattleZone II. In BZII you could now build structures and vehicles from over the top view which helped me A LOT.

Other than that I would love to see Alpha Centauri and Red Alert remakes, just like they are but improved.