Line sheet pan with aluminum foil or parchment paper.
Place potatoes on sheet pan and brush with melted butter and ½ teaspoon Old Bay. Roll around on pan to coat with butter and seasoning.
Cook at 400 degrees for 15 minutes (longer if potatoes are larger than petite/new size)
Add corn, brush with butter and sprinkle with ½ teaspoon of Old Bay, coating all sides.
Return pan to oven for 7-8 minutes.
Add shrimp, sausage and half lemon wedges, squeezing the lemon wedges over all. Brush shrimp with melted butter and sprinkle another ½-1 teaspoon of Old Bay. Toss all to blend, keeping a single layer on pan.
Cook additional 8-12 minutes, or just until shrimp are pink and cooked through. Check potatoes for doneness.
Remove from oven and sprinkle entire pan with hot sauce, tossing to coat.