Preheat oven to 375 degrees F. 

In a large bowl, add breadcrumbs and milk and allow to soak for 5 minutes.

While the breadcrumbs are soaking, dice onions and mince garlic. Heat oil in a saute pan over medium heat. Add onions and garlic and saute until soft, about 3-4 minutes.

To breadcrumb mixture add mustard, vinegar, ketchup, and worcestershire sauce. Stir to combine. 

Add in ground venison, ground pork, 2 eggs, and sauteed onions and garlic. Work the mixture together with your hands until everything has just come together but don't over mix.

Line a baking sheet with tin foil. Pour meat mixture on top and gently form into a loaf shape. Place into the preheated oven for 55 minutes, or until the internal temperature reaches 165 degrees F.

Remove from oven and wait 5 minutes before slicing.