After being frozen for 30,000 years, some mammoth meat is reckoned to be still edible. Dunno anyone that's tried it, though wolves and bears have enjoyed it, seemingly. Let us know... ;-)
I had a freezer like that, a 10cuft chest freezer, the first thing Trish did when she moved in with me was make me get rid of it and buy an upright, much easier to keep a check on whats in it. I regards to your meals 10 years in the frozen food industry cured me of worrying to much about dates, though as missnemesis says they might not be at their tastiest.
Providing the freezer has not even slightly defrosted during that period, they should not be dangerous, but they will have lost a lot of flavour and all of their vitamins.