Commandos 2 - HD Remaster

If you are this far you probably know what you are doing and there are many guides in the internet, however I want to point out one crucial point in this mission: you can only destroy the guns with the remote bombs and there are only 5 in this mission and if you use them for something else, then you will not be able to finish the mission and have to start over again!
So I strongly recommend making a manual save before using any remote bombs with the Sapper and make sure you are having them explode in the right place and don‘t make the same mistake I did - I had to start this mission from scratch after 6 hours of playing it as I had used the remote bombs on the guns outside instead of the ones at the end of the tunnel and by the time I realized my mistake there were no remote bombs left and I had overwritten all my quick saves where I still had bombs.