Critical Path 3: Hot Planet

I finished with around 4hours 30min left on my trial so I went back and did most of the stuff that I could be bothered doing (mainly cuz I wanted to fix the radiation before I explored T.T). I noticed that a lot of stuff was in Level 3 Rad zones! It seems like there is A LOT to go through just on Eos...

Also, the fiend battle at site 2 was epic!

Yes. The only areas you can access outside of Level 3 Radiation are:

Site 1
Site 2
Part of the cliffside over Site 1 for the Lost Brother sidequest
The three monoliths for crit path, along with the kett research station where you meet Drack for the first time, and the space between, including a few small areas to skirmish with Remnant and kett
The lake for crit path
The Four Giants area for the First Murder sidequest (other stuff happens here after trial period)
The lake on the other side of the mountains where you set up the colonial outpost, Prodromos, after clearing the radiation in the crit path (nothing but fluorite deposits here before that, though)

Prodromos continues the Greek naming theme in the system. The star, Pytheas, is named for Pytheas of Massalia, the Greek explorer and cartographer who sailed to the Tin Islands (Britain), Thule (Iceland? Faeroes?), the land of the Gutones (shores of the Baltic Sea west of the Vistula), and up the Don River. Eos, Habitat 1, is named for the Greek goddess of the dawn, as noted by the planet's description in the galaxy map. Prodromos is a Greek word that is often translated into English as "forerunner".

Prodromos acts as a small hub for the planet's quests, as do the other planetary outposts, apparently. The settlement becomes quite busy shortly after being established; there is a lot of air traffic in shuttles, and work crews range far out into the surrounding desert.