To Start: See Below
If you're up for a game of tower defense, head to Sanctuary and try the Bixie Defense game.
This is a Search quest. This quest is repeatable.
This quest is no longer available in the game, but the information is kept here for historical purposes.
To begin this quest, click on Sanctuary's Bixie Tower Defense table minigame icon on your atlas, then choose Show Path. The quest will automatically be added to your journal, and a quest marker will point you toward the gaming table.
Once you click on the table, the quest will automatically complete.