Planet Alcatraz - heal myself with potatoes.
Find heavy armor (you looks like Dalek with legs and arms), wielding heavy machine gun. Walk
really slow, then stop and shoot. This is something.
7,62 High Calibre - customised my M-16 with addons (obligatory underbarrel grenade launcher) and camo, put camo on myself, then clean out enemy camp like in Predator.
Marauder - kick assess of kwan army. After playing as a good soldier and kwans in video games - feels refreshing.
Gorasul - when ego of your sword (like Likalior from BG2, but more developed game mechanic around it) broke and can't do anything, bouncing off from enemies.
Boiling Point - Road to Hell - steal random car, fuel with canister found in the car, fix the wheel, drive away while listening to the southamerican local music.
Plus piloting heli without making pilot license. Didn't end well.
Gothic 2 - coming back to the Mine Valley, where previous game have place, and find it in even bigger ruin than it was before. You start wondering "is such thing possible? Looks like it is".
In fallout, when I arrived at "the glow". Was very atmospheric and spooky. One of my fondest memories from the game.
And then you recognize you didn't bring the rope.
And you start losing HP....