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human
[Metal Gear] Can anyone provide a good ELI5 version of the Metal Gear Solid series' plot?

Like seriously, wow. I have a pretty busy schedule and don't really have time to go through the whole series but I always thought MGS4 on the ps3 looked cool and my friend said he would let me borrow it for a while, but I'm sort of lost.  If anyone could help explain this stuff, that would be great!
gpt
Synopses:

MGS1: Snake is sent to take out Liquid who has stolen a nuclear stockpile and is holding the world ransom. Snake makes best buds with a nerdy scientist who calls himself Otacon. It turns out that Snake and Liquid are both altered clones of Big Boss. Liquid thought Snake had the superior genetic engineering but actually Liquid did. Ocelot looked like he was working for Liquid but was actually a double agent.

MGS2: Snake and Otacon start a group (I use the term loosely, it's just the two of them) called Philanthropy to expose and destroy Metal Gears. He's photographing a secret Metal Gear project by the US military when some Russians show up to try and steal it. Ocelot shows up with a transplanted arm from Liquid and randomly gets possessed by it sometimes, then sinks the boat they're on and steals the Metal Gear. Ocelot looked like he was working for the Russians but was actually a double agent. Snake is reported dead but who are they fooling?

Later in MGS2: Crazy AIs orchestrate a recurrence of the events of MGS1 to try and turn Raiden into another Snake but then everything goes to shit because he does his job too well and gives them a virus. Raiden turns out to have been a child soldier under the rule of another clone of Big Boss called Solidus and has to kill him at the end. Most of this was probably virtual reality and Raiden starts doubting his perception of reality but Snake tells him to stop over-thinking it. Ocelot looked like he was working for Solidus but was actually a double agent.

MGS3: During the Cold War, Big Boss (who is currently called Snake) is sent to rescue a defector from the Russian jungles (just roll with it). He fails at this, his mentor, the Boss, defects to some Russian extremists who she has a history with. The Russian government is pissed and Snake is sent back to the jungle to kill these extremists. It turns out the Russians he's sent after want some secret giant quantity of money and the Boss was actually a double agent whose job it was to keep that away from them. A double agent ally of yours named Eva turns out to be a Chinese triple agent and makes off with the information on that hidden sum of money. Ocelot looked like he was working for the Russian extremists but was actually a double agent.

Some general things to know about the series:

* Everybody Otacon cares about ends up dying.
* The entire world has a raging stiffy for Big Boss.
* A man named Johnny who has chronic diarrhea guards the player characters whenever they are imprisoned.
* People keep pissing themselves.
* Most of the boss characters you fight are pretty explicitly magical and nobody seems to notice.
* Bipedal tanks that roar like dinosaurs for some reason are the pinnacle of weapons technology.