If you want to customize your order by adding games, you can. For any level 2 order or higher, simply add 20 for each DungeonCraft copy, 20 for each Treasures and Traps & Expanded Realms Expansion, or 25 for each added Villagers and Villains copy. Each time you add a game, raise your shipping level.
For example: if you order 1 DungeonCraft Level 2 (25) then add 1 copy of Villagers and Villains (+25) and another copy of DungeonCraft (+20) your pre-shipping total is 70. Now, to determine shipping, look at level 4 (original level 2 + 2 games). Remember you can reduce shipping see FAQ above.