I used to have Strike Fighters Vietnam on my old PC, and I was thinking of d/l it for my new PC and was doing research on it after that thread here about SF a few weeks back.
Apparently they have a Grind game, kind of like Ace Combat Style external view. Pretty fun and not too hokey as most games like these are. For example, you only have your set number of missiles for aircraft with missiles. (Just un-locked my first missle bird F-8A.)
It was made with the SF engine, so graphics are similar. Terrain is low-res. You get a certain amount of time to shoot down as many aircraft as you can. By shooting down more aircraft you unlock keys to new aircraft, in which the game has a crapload of aircraft and different variants.
It starts in 1954, and has the F-100, MiG-17, Hawker Hunter, and Mystere. It's a free download.
http://www.thirdwire.com/index.htm
