User:Hawkins/Sandbox01

Sub tier availability

Outpost type	Cold Caverns	Europan Ridge	Aphotic Plateau	Great Sea	Hydrothermal Wastes
Habitation	1	1	2	2	3
Military (Attack class only)	1	2	2	3	3
Research (Scout class only)	1	2	2	3	3
Mining (Transport class only)	1	2	2	3	3
Colony	1	2	2	3	3

Purchasing higher tier submarines is strongly recommended if the player wishes to venture deeper into Europa. Only submarines with tier 3 hull upgrades can withstand the pressure to complete the final level.
The five default tier 3 submarines are: the Typhon 2, the Remora, the Kastrull, the Winterhalter and the Berilia.