Answer #1: No, it is not from Harry Potter.

Magic Wand is incorrect.

Answer #2: No, it is not a throwing weapon.

Ninja Shuriken is incorrect.

Is it from a sci-fi setting?

Light Sabre?

Is it used by Jedis?

A light Saber

I guess a reset means I can ask and guess again.
Does it make a pew pew sounds?
Guess: Laser Rifle

Answer #3: It is not from a sci-fi setting.

I'll let Aniki's question slide since Answer #3 invalidates it.

Answer #4: It does not make pew-pew sounds.

No correct guesses.

Is it handheld?
Guess: Lightsaber

Oh oh, missed all the clarification while typing my question & guess.
Ah well, next time :)

Q: Is it a space station?
G: Death Star

+1

Is it a melee weapon?

Pork Sword?

Is it a Sci-fi weapon?

Tesla Cannon

Q: Is it from a video game?

G: BFG 9000 from Doom

Answer #5: Yes, it is handheld.

Answer #6: No, it is not a space station. (Although I am a huge Star Wars nerd.)

Answer #7: Yes, it is a melee weapon.

Discarding Shiuman's because we've already established it's not from a sci-fi setting.

Answer #8: Yes, it is from a video game.

No correct guesses.

Is it a Sword?

Soul Edge

Answer #9: Yes, it is a sword.

It is not the Soul Edge.

Is it a dagger?

Dagger of Time, from Prince of Persia series

Is it "physical"?

Soul Reaver