It all starts with how you treat the meat after a kill, we like to soak our hogs or deer in ice water with a little bit of vinegar, then if I grill deer or wild boar I like to marinate in Italian dressing for at least 4-6 hours or best if over night.  Milk also works good to marinate or any type of fruit juice, pinnaple, etc..  We like to also take our wild game to a meat processor to get processed into steaks, pork chops, roast, etc and the meat usaully comes back to us in great condition.  I recomend purchasing a wild game cook book and try different recipes and see which one works good for you to cook and eat the wild game while still tender and moist.

Thanks for the reply.  I feel stupid for asking, but does marinating in fruit juice change the taste of the meat?  I love the flavor of wild hog meat and wasn't sure if marinating in fruit juices would make it citrus tasting or anything like that.

I would not say that it changes the taste of the meat, sweet fruit juices complement the sweet flavor of pork and goes well with it, but you can't overdue the marination, I would research also doing injections into the pork.

marinating the meat in fruit juice ads to the taste but also the acids in the juice break down the muscle fibers thus tenderizing the meat

Soak in lemon juice for 24 hours

I know an old man with about four teeth left in his head.He soaks all his barbeque and game in vinegar solution the night before.He is quite fat so he must be on to something good here!