Fallout One
I was wondering how the stealth skills (sneak, steal, lockpicking) work. I read that to be able to steal items more effectively i need to pickpocket from behind the npc. But does the sneak skill come into play at any point? Or is it just to get past enemies without being seen? And is there a point to have a good lockpicking ability or can you perhaps always steal a key and get it open that way instead?
Was planning to play a sniper/thief

, but with limited tag skills i'm not going to make all three of those so i would like to know more about them to able to make a good choice.