I have a simple go to marinade for any red game meat. 2 parts olive oil 1 part sesame oil 3 parts soy. Crushed garlic and black pepper to taste. Marinate for about an hour. Then onto a very hot grill and cook no more than med but for best taste I like to cook no more than the rare side of med rare. Hit with just a bit of salt as it comes off the grill.You really don't taste the marinade but it enhances the the flavor of the meat very well. Which is what I want with game meat I want to taste the meat not the seasonings. If I want some intense flavor I will just use a piece of tasteless cheap beef and go nuts with the seasonings.