I'm imprisoned in the military base by the big mutants. If I lockpick the door, I'm seen no matter what. He kills me on sight, or he takes me to the leader again, who then kills me on sight. What the hell do I do now!?

Whatever. Fallout is severely overrated. I just ask more of my games. This is not an RPG. This is a choose-your-path adventure book, with failures at every turn. I don't care what the manual says. If the game requires you to take yourself out of the experience and manage a dozen save files, guess what? It's a bad game. This is fact. Managing saves is not a fun activity. It does not constitute a game. Therefor, it does not belong.
It's clear I'm surrounded by long-time fanboys here who can't tolerate any debating against their little game. Every argument so far has been an elaborate alternative to "no u".

i'm an old school gamer. Mostly on the console though because we didn't have a pc till i was in 8th grade and that was a brand new top of the line pentium 100mhz with 16mb of ram.
so i don't know what these "rules of rpgs" are that you speak of, but even back during the early final fantasy games i got in the habit of ALWAYS keeping at least 2 saves just in case i got stuck in a situation that i didn't like.
you chose not to do so, now you get to figure out how to solve the problem or start over.

You can name a hundred other games they break the rule, and they'll all be crappy games. We can do this all day. If you or anyone else claims to enjoy managing saves, then we'll have a bunch of liars on our hands.

fallout is certainly not without flaws. but from your subsequent posts, it doesn't sound like you tried any of the advice. i left a pretty detailed walkthrough of possible options for you at this point. if you're far enough along in the game that you were captured attacking the military base, then you should be able to get out of your cell and do almost everything i mentioned above. i was able to do so with a low/moderately leveled character because i was captured in necropolis.
have you at least been able to escape your cell? did you try waiting for the guard to walk away? did you try sneaking out?

Dude, I'm not a long-time fanboy. I'd recently heard that Fallout was cool, so I was happy to hear I could get it for $6 on GOG. I bought this game a few weeks ago and finished it. I had a good time, so I also bought Fallout 2. $12 well spent.
I suppose managing save files isn't "fun", but it's not so bad that it kills immersion for me. Seriously, what do you do if you have to pee or answer the phone? And it's not like 2D top-down is all that immersive to begin with.
I can think of two good games where you never have to save your progress: Peggle & Bejewled.
I haven't played a huge number of PC games, and I don't have a console, so my experience could be considered limited. But I've played a dozen RTS's and a few RPGs, and I've never encountered a game where it wasn't prudent to save with at least some regularity.
Shit happens, then you re-load.
I would love to hear the name of an immersive game where the AI is forgiving and lets you back out of every bad break and you only have to save when you turn your PC off to go to bed.

Edited for content.

I didn't respond to your strategies because I had already tried half of them before I made this thread, and the other half just aren't valid. For example, the mutant never moves. He just stays there ready for me to come out so he can kill me.

can you attach your save file? i'd like to try out your game, see if i can figure anything out for you.

Hmm, ok. Hope this works.
[url=]http://www.megaupload.com/?d=04H9VNXR[/url]

wow. you really are screwed in your game. here's what i was able to do. you can use repair on the force field emitter, which will temporarily disable the field. then you can get to the elevator. once you go down to level four, you can keep sneaking towards a force field north of the elevator. there, you can use repair to shut down the force field and get to the computer. at the computer you can start the self-destruct sequence.
beyond that, there's nothing you can do. the reason you are attacked immediately is because the base is on alert. i assume this is because you were captured while attacking the base. because the base is on alert, you cannot get to the mr. handy on the 4th level and get the minigun. the mutants there will attack you immediately.
does anyone know how mozgus could disable the base alert? i don't know if there is a way, but if i find out, i'll let you know.

At this point I just dont care. I moved onto Fallout 3. Already put in like 10 hours and it's clearly the better experience. It's just much more balanced and the quests are more reliable. The graphics are just a bonus.

I had a similar question, I was captured in necropilis and didn't let Lou have infomation. Luckily for me, I had Ian as a companion. He had a hunting rifle on him with some bullets. I took it and killed the first mutant. Then I Killed the 2nd with a laser rifle I picked off the 1st mutant. Now I can't de-activate the barriers. PLS HALP MEH

Woah, I think this is the biggest necrobump I've ever seen in this website.

Observe the color of the field.
* If it's red, and you aren't low on HP, just walk through it. It will hurt, a bit.
* If it's yellow, you can't pass so easily.

To deactivate the yellow field, use the repair skill, in the machine located at one of the sides of the force field.
If your repair skill is low, you can plant explosive to pass the field.
There's also a way to disable fields, if you have radio in inventory: https://youtu.be/u17PDoXctJw?t=7s