This!"my wife says it's too gamey"
My wife adds 2 beef bullion cubes to her chili and roast and then slow cooks it all day in the crock pot. However, I also butcher my own deer and it gets soaked in cold salt water usually for a day, off the bone, and rinsed good before I cut and wrap. If you dont process it yourself you could probbly try soaking it in salt water before you cook it as well. Make sure you use non iodized salt and go easy with it or it will taste salty. I have never had a complaint about my deer being gamey doing this and we also grill a lot of deer steak. Field care and processing are also important.
You gotta get the blood out of the meat to get rid of that gamey taste. Soak in cold salt water pulls the blood out, soak for at least a day, even 2 won't hurt.
On steak cuts, I've even soaked in garlic salt water, for at least a day, they turn out so tender & delicious.
Never any gamey taste.