I know its kind of simple, but I have a buddy who hunts and has killed 4 deer this year. I have half a freezer full of venison burger, which I've made some simply banging chili. I love using venison because its a lean meat, this is actually somewhat healthy chili, it doesn't have any of that greasy taste which you associate with traditional beef chili. My recipe is a bit simple since I use the premade spice pack.
2 lbs venison, brown in a fry pan, drain what little fat there is. I usually add about 1/2 of a Kroger "Hot Chili" spice packet into the meat.
Put the browned venison into a pot, add 2 cans of diced tomatoes, 1 can of kidney beans, 1 can of pinto beans, half an onion chopped fine, half a bell pepper also chopped fine. Also add another whole packet of Kroger "Hot Chili" spice mix.
My secret with this chili is that you double the recipe listed on the spice packet, use 1/2 of the spice packet on the meat, and one whole spice packet in the soup later. Ends up that you have about 1/2 a spice packet left over, but from experience if you use both spice packets the stuff becomes too hot. I love a chili with a good heat, which is what you end up with 1.5 spice packets. 2 spice packets makes it too hot, not so hot you can't eat it, but it overpowers all the other complex flavors of the onions, beans, venison, etc.
Anyways, you bring it to a boil, cover it, and simmer for 10-15 minutes, until those onions are cooked.