Go to Options and switch off the annoying 'Auto-aim' feature, and you've got yourself a reasonable FPS for your PSP.
Like all Call Of Duty games (excluding Call 4), the game is based in a World War feature where you have to follow objectives and kill those Nazis. RTV does all this and tries to fit in a handheld console, and once again succeeds. However, there are some things that make this game slightly annoying. Switching Auto-aim off is great, but then it means your going to have to get used to using the buttons; Triangle, Square, O and X a lot. That'll be no problem for gamers of MOH: Heroes, but for those who are not used to this, your going to be having a few problems. Luckily, you can aim down the sight, and when you do this, it autoaims at the nearest enemy, making this much easier. The other thing i noticed is that the PSP version of Call Of Duty doesnt really give away a lot of scenery. You'll mostly find yourself in broken buildings or occasionally in a small garden area, you'll hardly ever find yourself in a nice forest scene. But COD makes up for that by giving you great AI on your team who makes it feel like a real WW2 game.
The multiplayer isnt much to write home about, it only supports Ad-Hod mode which as MOH has great online gaming. So you'd think COD would do the same. Still, theres no need to whine, RTV does it's best.
If your looking for a decent WW2 game after you've bought MOH: Heroes, COD: RTV is you next choice.