The gamey taste can come fromseveral different things....

1) where did you shoot it?

A deer shot cleanly through the chest cavity, or any place that doesn't allow the stomach contents or guts to spill into the body cavity will prevent the gamey taste.

2) Field dressing

A clean field dressing is imperitive, do not cut the stomach or guts. (see #1. Flush out, cool down as soon as possible.

3) Processing

Remove all tallow, deer do not have fat. Tallow tastes like crap (gamey). Avoid sawing through bones because the chips and marrow will leach into the meat and cause gamey taste.

4) Cooking preparation

Remove any remaining tallow,blue skin etc. When you cook venison you'll have to go at least 1 down from your beef preference. Ex. If you like Med. well, go to med. for venison. Since there is no fat it will dry out much quicker than beef. Slow cooking works great with venison. Cube some steaks and put into a crock pot with a couple cans of condensed beefy mushroom soup, extra mushrooms and onions. cook slowly!