Well, according to the manual 4 cirtical hits with a rocket launcher grants you a remote-controlable rocket. W00t!!!
However, I can't find the 'cirtical hit spot' on any of the vehicles. I thought the AT-AT was the most easy to hit so I played Hoth 99 times, I hit it everywhere, I even landed my snowspeeder on it and exited the speeder to shoot the At-AT from above, but I still haven't score ONE critical hit
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