Dungeon Galaxy
A Dungeon Galaxy (DG) is a special galaxy chain of variable depth and width. Many DGs are scattered throughout the universe and are represented by red tabs on the universe map. A DG is entered through a red warp gate.
DG Structure
Each DG has at very minimum two stages, but can have as many as 14 stages. You can determine the depth of a DG by its name. The number before the decimal refers to the depth to end so if you see a DG named DG Sol 3.405 you know there are three gates until you hit the final stage with a boss AI. A player must kill at least half the AI in each stage in order to move onto the next stage.
The number after the decimal in the name is a unique ID of the DG. This number remains the same throughout the entire DG as a means of identifying a specific DG stage when one galaxy hosts multiple DGs.
Some DGs can feature splits, where the a stage will feature two wormholes each leading to their own boss. When a split occurs each split is identified by a letter at the end of the stage name, starting with A.
Danger Factor
The danger factor of a DG is massively inflated from the outside universe. The first stage is ten times higher than the connecting galaxy, and each stage thereafter increases the danger factor by 50 on average.
Lower danger factor DGs do not increase so rapidly.
DG Boss Drops
At the last stage of a DG is a boss AI and its guards. The boss drops rewards from it's assigned tables based on the danger factor of it's stage. The prize is somewhat random, but some DGs are more likely to drop particular pieces of equipment than others, because the "range" of possible drops is determined by the danger factor. A list of DG drops can be found here.
Some special bosses also have rolls on extra items or lists.
Freezing Items
A DG stage which has no players in it is not updated by the server, so any items dropped in that stage "freeze" after 30 seconds and do not change until another player enters.