Space Dungeons

Space Dungeons are randomly generated structures on specific planets. The easiest way to find them is by flying around the surface of the planet and looking for a large hole in the ground with dungeon brick at the bottom. All Space Dungeons are generated as a series of rooms with mob spawners that lead into a large arena with a boss fight. Each type of dungeon has a unique boss, but they are all extremely easy to beat with a Tinker's crossbow. Just do not leave the room or else the boss respawns with full hp. Once defeated, they drop a key to unlock the nearby treasure chest containing basic dungeon loot and potentially the schematic for the next tier rocket.

The following table lists all the different Space Dungeons in the order in which they are completed. The schematics must all be obtained legitimately at first, but additional copies may be crafted in a laser engraver to prevent loading more chunks. Sometimes the boss room does not generate or there is no schematic in the final treasure chest, unfortunately.

Rocket	Planet	Boss	Schematic(s)
Tier 1	Moon	Evolved Skeleton	Tier 2 Rocket, Moon Buggy
Tier 2	Mars	Evolved Creeper	Tier 3 Rocket, Cargo Rocket, Astro Miner
Tier 3	Ceres	Evolved Blaze	Tier 4 Rocket
Tier 4	Io (moon of Jupiter)	Evolved Ghast	Tier 5 Rocket
Tier 5	Enceladus (Moon of Saturn)	Evolved Crystal Ghast	Tier 6 Rocket
Tier 6	Proteus (Moon of Neptune)	Evolved Slime	Tier 7 Rocket
Tier 7	Pluto	Evolved Wolf	Tier 8 Rocket, Draconic Core

Bosses

The following is a list of all the bosses and their attributes. GTNH increases their health by 300%, but that is still no match for the Tinker's crossbow. In addition to dropping a key for the treasure chest in the next room, there are quest rewards for defeating them.

Evolved Skeleton Arena	Evolved Skeleton Moon Dungeon (Tier 1 Rocket) 450 Health Shoots arrows from a distance at the player. Picks up and throws the player. Does not do damage, but can send them into the lava.
Evolved Creeper Arena	Evolved Creeper Mars Dungeon (Tier 2 Rocket) 600 Health Shoots TNT that explodes immediately upon impact. Immune to all weapons. Reflect the TNT back at the boss to damage it. The creeper eggs around the room spawn baby creepers if hit by the TNT.
Evolved Blaze Arena	Evolved Blaze Ceres Dungeon (Tier 3 Rocket) 900 Health Shoots fireballs that light the ground on fire.
Evolved Ghast Arena	Evolved Ghast Io Dungeon (Tier 4 Rocket) 1,350 Health Rapidly shoots fireballs that explode and light the ground on fire. The glass can break from the explosions, opening the floor up to lava.
Evolved Crystal Ghast Arena	Evolved Crystal Ghast Enceladus Dungeon (Tier 5 Rocket) 1,950 Health Shoots fireballs that explode and light the ground on fire. Periodically turns invisible. Cannot be damaged while invisible.
Evolved Slime Arena	Evolved Slime Proteus Dungeon (Tier 6 Rocket) 2,700 Health Jumps menacingly towards the player. Does not split into smaller slimes.
Evolved Wolf Arena	Evolved Wolf Pluto Dungeon (Tier 7 Rocket) 1,200 Health Relentlessly chases down the player.