Knives are the Murderer's weapon — and the game's main collectible. Some are starter gear you'll toss after one round. Others rank among the rarest items in all of Roblox. Whether you're trying to win or building a trade empire, you need to know rarity and value.
Most drop from crates — Common, Rare, and premium tiers each pull different rarity pools. Event-exclusives only appear during their event window, then leave the pool forever. That's why their value climbs after the event ends. Trading's your best bet for a specific Godly without gambling through a hundred crates. Save your best knives for trades that actually improve your collection.
Real talk: all knives kill in one hit. Stats aren't a thing. So the "best" knife is whichever one you like looking at — or the rarest one you own, if you're flexing. Focus your energy on movement and timing, not which blade you're holding. The win comes from landing the hit, not the tier of the weapon.
Never "loan" a knife to "prove trust." Never trade outside the official window. "Duped for value" stories and "double your knife" offers are the oldest tricks in the book. Check both sides of the trade screen carefully before you accept.
See the other weapon type in our Gun Guide. Round out your play with the Strategy Guide. Seasonal knives? The Seasonal Items Guide covers them. Grab MM2 codes for free crates and gems.