It'd be nice to see a list of all PCE and MD shooters - yes, the japanese systems (no run-n-gun, please). Maybe the snes, too, I guess.
For US systems, I've remember thinking the Genesis was a shooter system in the early days, but when it gained more popularity the ratio widened.
Gaiares was the best shooter overall on the MD. Some of my favorite music on the genesis, too.
TF4 had some really cool effects, but the game just lack the fun of TF3. After the wow of the effects wore off, I didn't play it much. I also remember some of the scratchy audio got annoying after a while. The best areas were the ocean/mountain level and the space station/city level (desert level was nice), then the game starts to gets blah after that.
TF3.... <3!