Well, I finished COD 4 a few hours ago, and have been playing the arcade mode, with the Mile High Epilogue quest.
It’s a lot of fun, although I’d think that playing it on Veteran is impossible because of the short time limit.
So far my High Score is ~ 78,000 which I did on Hardened, and still had 1 life left, having completed the mission with 7s on the VIP timer. I know it’s not an amazingly high score, but I’ve only been trying for ~40mins.