Here is what I have found so far for the final Gate within the main map of the UFISS colony world.
This should not take away from shadowcrunch's thread located here
https://cot2.forumotion.com/t4-lookie-what-i-foundas he has gone to the central location and I have not. I'm just making this thread to keep things in line with the others so far, and to add a battle report.
You enter the Jupiter Gate, which is located roughly N - NNW of the colony ship, near the top of the map., and you emerge along the southern border (I plan on double checking that information, so bear with me should I be wrong). There are three key destination points on this map, along with, I believe, four additional jump gates.
One location, as described by shadowcrunch, is a store called the UDA Achievement Reward Center, and is found in the center of the map.
The two other locations are labeled as U72 Contamination Alert Area (lower left quarter) and the Contaminated Alien's Habitat (upper right quarter); both contain... ready for this?... Sol and Antimatter harvest sites! I am currently harvesting antimatter so I can level up my hospital; they will ask you the usual questions, so refer to our other link that discusses harvest answers to get all you can!
Off hand, I cannot tell you the name of the enemy unit located here, but they appear as large jellyfish with short tendrils. And, I believe, they are a level 25 unit. The do provide a worthy challenge, even for my fully equipped Neo Troy; no, I still haven't gotten into the habit of bringing along replenishment packs of any sort, and as such, as of right now, I can take on five to six of them, but not at the same time; you will cycle through your weapons two or three times to destroy one (at least, with a Neo, cannot say for more advanced mech).
One of these jellyfish craft will drop 5 Metal, 5 Gas, 5 Ither, 1 Sol, and 1 Antimatter, 120 experience points, as well as an Amureta's Core, which is required for the quest "Exterminate Contamination Guard Aumreta", which is marked as a level 21 quest. Completion of this quest gives you 1500 gold and 10000 experience points; you just need to collect 10 Amureta Cores.
Carry on!
