The royale cannon is an upgraded version of the gold dwarf multicannon, adding gems and other cosmetic items to the dwarf multicannon, released on 8 March 2011. As of 17 June 2013, it also holds 90 cannonballs, compared to the 30 cannonballs for a regular dwarf multicannon, and the 60 cannonballs for a gold multicannon. In order to purchase the upgrade, players must participate in the Artisans Workshop until they have 100% respect, then speak to Elof with all four parts of a gold dwarf multicannon in their inventory.
Players cannot apply this upgrade to normal dwarf multicannons without first purchasing the gold dwarf multicannon upgrade for 50% respect - effectively making the true cost of the royale cannon 150% respect.
After this upgrade is purchased, the player can buy a reward called "Restocking cannon", which allows your cannon to auto-refill its ammunition as long as you are within 15 spaces and have cannonballs in your inventory.
The royale cannon consists of:
- In the game guide, a picture of the royale cannon is captioned "Dwarves must use the metric system", which is a reference to an iconic scene from Pulp Fiction wherein the characters discuss how a "quarter-pounder with cheese" is called a "Royale with cheese" in France, and one asks if that's because France uses the metric system.
- All pieces of the cannon have an items kept on death value of 1 coin except for the base, which has a value of 187,500 coins, which is equal to the store price of a normal cannon from Nulodion.
- While the upgrade was intended to be cosmetic, a glitch once existed that allowed a Royale cannon to be used in areas that do not allow cannons such as the Chaos Tunnels and Kuradal's Dungeon. This has been fixed in a hidden update.
- When attempting to buy one without first buying the gold version, it gives the message: "You need to unlock 'Golden Cannon' before you can access this."