I started playing Schleichfahrt / AD again with the GOG version and I have no problems in the first couple of missions.

That is until I come to the point I have two missions to do, either the mission you get after you deliver the diamonds or the mission with the Infiltrator in Lima I.

In the mission after the diamond delivery to Lisa X in Entropoint VI I manage to survive - but I never can save Caigans live and fail the mission.

In the Lima I mission I can destroy the first wave of 3 and the Infiltrator and the second wave of scouts but not before the pipeline is damaged and I fail the mission.

Is there any trick to these missions that I miss?

Or am I simply underequipped at that point in the story? My Hiob has the Spy II sensors and the Vendetta II gun.

Edit: Several tries later with some luck I managed to finish the mission of Lisa X and save Caigan (it seems that fighting the bad guys in the vicinity of the shooting turrets had not been a good idea).

Which means that my next mission is the Lima I mission that I already failed a dozen times...

I'm on the same mission. And haven't found a way to solve it yet. It feels like the pipes almost instantly explode when I turn for the third wave of scouts although I shoot down the second pretty fast.

https://youtu.be/kdWPGx60hpQ

It's definitively possible.

I looked at the video and I’m relieved that the player there had the same problems as me and needed several attempts too. ;-)

Do I understand the video right, that I can take as much time as I want to defeat the first group of 3 scouts, because everyone later is only spawned when I reach NAV A? And only then the timed events start where I have to get the Infiltrator, 2nd and 3rd group of 2 scouts as fast as possible?
If that is so - then how did he manage to get to the infiltrator once before the infiltrator hooks up to the controlcentre and is still on his way there?

I finally managed to finish the Lima I mission after quite a lot of failed attempts and some help from a germanspeaking forum for Schleichfahrt/Archimedean Dynasty
http://www.jealousjellyfish.de/viewforum.php?f=8

It did cost me a full magazine of torpedos so no profit in that mission...

In case anyone reads this topic I made a small tutorial for this mission:

https://www.gog.com/forum/archimedean_dynasty/how_to_succeed_the_broken_mission_sabotage_at_lima_1