Preheat the oven to 350°F. Drain the oysters, reserving the ½ cup of oyster liqueur.
In a large bowl, combine the cracker crumbs and butter. Spread ⅓ of the cracker mixture into the bottom of a 9x13" casserole dish, and then top with ½ of oysters. Sprinkle with pepper. Repeat these steps once more.
Combine the half & half, oyster liqueur, worcestershire sauce and salt. Pour the liquid mixture over top of the layers in the casserole dish. Top with the remaining crackers.
Bake for 55 to 60 minutes uncovered, or until the top is golden and edges are bubbly.
