This was the very early stage of TC with Venar when only the upper part of the map was available and no units were on the planet and the story would have been community based by a voting system.
This in particular was a story mission to kill Harvs to get a chip or something and if done correctly was an infinite one to leave the last Harv alive and only attack it to get the 10 interc then retreat so the Harv looses aggro and heals back up to repeat this step again.
The Interc had for some weird reason an insane high cryo drop rate making it easy to farm good amounts of Cryo and as mission Cryo never despawn an "Ocean" of them could easily be made (don´t know if it´s still the case for mission cryo).
Basically it was a dream mission as it was impossible for others to disturb you cus the Harvs were mission ones and so only you and your squad could shoot them and the Interc + as mentioned infinite.
Only downside iirc was that the Interc didn´t had the cryo values as we know them now
