A Blunderbuss in the hands of a blockhead is a catastrophe waiting to happen. You're not a dunderhead, but exercise great care.
The Blunderbuss is the last of Alice's weapons in American McGee's Alice. It is the strongest weapon in the game and consumes all of Alice's Will in one shot, unleashing a powerful blast against her enemies but reducing her to using either the Vorpal Blade or the Croquet Mallet's melee attack until her Will is replenished. As a toy, it may have been used to represent a cork gun. The Blunderbluss is a "secret weapon" and can be found in only two locations:
Upon revisiting Caterpillar's Plot after the battle with the Jabberwock, Alice will find Humpty Dumpty sitting near the brick gate that led to the oracle. He occasionally gestures toward a brick that is sticking out. Pressing this brick down will unlock a secret passage in the gate, where the Blunderbuss may be found.
During the final battle with the Queen of Hearts in Heart of Darkness, Alice can find the Blunderbuss on a secret "shelf" beneath one of the larger islands ringing the Queen. There is also a teleport plate that will immediately return her to the top of the island.