A Death Star. Hugely powerful weapon, but also spacious living space, and travel solution all in one. Just need to get a grate over that exhaust port and we're all good.

The "Bobbler" from Vernor Vinge's Peace War series.

It's a device that can remotely enclose arbitrary volumes within "Bobbles", which are impenetrable and in which the time stands still.

It is instantly used as a kind of passive weapon, enclosing all known nuclear sites and big military installations in one go to force peace (although in the story this backfires into a strange kind of authoritarianism).

What's special about it is, that its weaponization is only a kind of secondary use, its later uses propel humanity into a technological golden age.

Ok, that's the most evil one I've read so far in the comments...

The answer here is a towel.

Captain Jack's sonic pistol fits the bill.

The Bowel Disruptor from Transmetropolitan:

Non-lethal, untraceable, and thoroughly unpleasant for any unfortunate sod that has earnt my ire!

Veritech Fighter

One of the DLC options for it plays Ride of the Valkyries, which also feels appropriate.

That was so satisfying in the movie. I was sad that he didn't spend the rest of the movie carrying around a bunch of them to use.

You could also selectively beam away important parts of a thing, or just dematerialize and never rematerialize.

The Farsight from Perfect Dark (or the equivalent gun from the last season of Deep Space 9). The scope sees through walls quite a distance away, and when fired the shot teleports to the target.

I think blowing up is always a weakness

They seem so impractical, especially on desert planets. But damn they are cool.

It's a long time ago that I read the books, but that was a thing that got stuck. I wonder if that thing was single-target or area-of-effect, but it would actually be a fun weapon to use. Especially on the unsuspecting.

A cheap clone of the Tasp. I assume Orgazmo came after 1970.

It did. It’s a 90s movie from Matt Stone and Trey Parker about a Mormon that becomes a superhero genre pornstar. At the time it was funny as fuck, but haven’t seen it in years to know if it still stands up or not.

Depends on context, for warfare probably a shard rifle that can be fed any metal for ammo.

For assassination, maybe a Star Wars disruptor rifle, seems useful to atomise targets.

For my daily life I don't need much killed or destroyed, so I'd probably go for a dual use thing, like the Portal Gun, Grabbity Gun, or perhaps high level psychic powers like Babylon 5's Jason Ironheart.

Wow. I didn't know it was multiplayer. I bought an old Xbox 360 a while back and it came with a bunch of games. I played portal 2 on that. Does it have multiplayer on that platform?

I liked it so much I bought Portal 1. I think it's better to play them in order. 2 was better than 1.

Yeah, I guess so. I only played single player and now I know.

They have been designed to "work" like desert insects, but yes, they are pinnacle impractical for anything that flies. Especially if you see the landing crafts that seem to work without rocket engines, IIRC. Why bother with wings when you could just float away. But what a cool design.

So it must have at least two batteries, right?

You sound like a hoopy frood.

I don't know if it counts as science fiction or fantasy, but The Subtle Knife would be my choice (if I could use it to its full potential).

Unless it's a bomb, then it's kind of a job requirement.

Which is a portable version of the Excessive Machine (Orgasmotron) from Barbarella.

https://de.wikipedia.org/wiki/Barbarella_(Film)

The Grille from Men in Black. I want to know how it works.

Transphasic torpedoes from Star Trek, because only one is needed to destroy a Borg Cube.

I still quote, “I am Sancho!”

I’d definitely take that for sure

Oh yeah 100%, you can play portal 2 local co-op or online co-op. I've never personally done online co-op on the 360, but it probably works fine.

Portal 1 is single player only and you're totally right about playing them in order, that's the way to do it.

Would the Infinity Gauntlet count?

I'm really not a gun guy, actually, I could go on for a while about why guns need to be eliminated from US society... But that's a rant for another time.

But I am a mechanics and engineering guy, and on a mechanical level, the p90 is very cool! It really manages an impressive number of innovative features for one device. In the field of its competitors, it stands out in a big way. It's like it tried to be a jack of all trades, and actually came out a master of most.

pluribus fan aye.

I don't recognize. is that just the bat with barbed wire from walking dead?

Well, chances are you can't resist using it on yourself and get addicted to it.
I think there even was some mention of it in the books...

The Celestial Orrery of The Necrons

Wait, was it called The Grabbitty Gun, and my deaf-ass heard Gravity Gun for 25 years???

One on the wall next to me + one on the wall next to my refrigerator = not having to get up for snacks.

BFG 9000

ISSAC NEWTON DOUGLAS ADDAMS IS THE DEADLIEST SON OF A BITCH IN SPACE!

Guide 2.0 is definitely a weapon. I'm talking about the one that looked like a bird that Random stole from Arthur.

yeah I should have specified but I was more thinking personal weapon than weapon systems or vehicles or such. something one person can carry around and use.

Oh, there's so many other uses for it if you put your mind to it...

It does have a “fatal intestinal maelstrom” setting, if I recall correctly... (and I'm not sure about the survivability of “unspeakable gut horror”...)

Niven's "Slaver disintegrator".

Good cafeteria as well.

Can you see it's means it is from my point of view?

Seems like a vastly underpowered plasma rifle

Go see the movies immediately, then immediately go read the books.

https://youtu.be/JDpvkwBBu6U

Tell that to Snoop