Can You Trade Effects in MM2? (2026)

Murder Mystery 2 lets players trade guns, knives, and pets, but effects sit outside that system entirely. They're a cosmetic layer that attaches to your knife, changing how it looks or behaves in-game, and Nikilis has kept them locked to the account that unlocked them since the system went live.

This wasn't always airtight. Back in early 2022, an exploit let scammers list effects, emotes, and radios in trade offers, only for those items to vanish instead of transferring once the deal went through. The fix closed that loophole for good, and effects have stayed untradable ever since, no matter how many players ask for it on the wiki or in trade servers.

In this article, we'll explore why effects can't be traded in MM2, what caused the 2022 exploit that briefly exposed a workaround, and whether there's any indication this could change.

Why Effects Can't Be Traded in MM2

Effects are cosmetic additions that attach to a knife, changing its appearance or adding visual flair like trails, particles, or color shifts. Most of them were introduced and locked into their current form after the March 2020 update, and every one of them ties directly to the account that unlocked it.

That restriction has nothing to do with rarity or balance. Weapons and pets move freely between players because the trading system was built around them from the start. Effects were never part of that design. They function more like account-bound cosmetics, similar to how emotes and radios work in MM2. Once you unlock an effect through a case or an event, it stays on your account permanently and can't be added to a trade offer.

The 2022 Trading Exploit

Around mid-January 2022, players found a workaround that let them list effects, emotes, powers, and radios inside trade offers despite those items being untradable by design. Scammers used this to their advantage. They would offer up an effect or emote as part of a deal to make it look more appealing, get the other player to accept, and then the untradable item simply wouldn't transfer. Only the weapons or pets included in the trade would actually move to the other player's inventory, leaving the victim short on what they thought they were getting.

The exploit worked because the trading system wasn't fully validating which item types were allowed to change hands before finalizing a deal. Since effects were never meant to be tradable in the first place, the game had no proper checks in place to block them from appearing in a trade offer, only to block them from actually transferring once the trade went through.

Nikilis and the development team closed the loophole shortly after it started circulating, and no similar exploit involving effects has resurfaced since. The fix reinforced the same rule that had existed all along: effects stay locked to the account that unlocked them, no exceptions.

Will Effects Ever Become Tradable?

Players have been asking for this since effects were introduced, and the requests haven't slowed down. Wiki threads dating back years bring up the same wish list of old effects people want to trade for, and the general sentiment in the community leans toward skepticism that it will ever happen. Recent discussion threads on the topic mostly land on the same conclusion, with players doubting Nikilis has any plans to change the system.

There's also the account-bound design itself to consider. Effects function as a form of prestige tied to progress or participation in past events, similar to badges or achievements in other games. Opening them up to trading would change what they represent, since anyone with enough coins or the right trade could obtain effects that were meant to reflect a player's own history with the game rather than something bought or swapped.

Until Nikilis or the development team says otherwise, effects remain locked to the account that unlocked them, and nothing in the game's current direction suggests that's changing anytime soon.

Final Words

Effects in MM2 were never built to be traded, and nothing about their account-bound design has changed since they were introduced. The 2022 exploit briefly exposed a workaround, but it got shut down fast, and the rule stayed exactly the same. Players can keep asking for it, but until Nikilis says otherwise, effects will stay tied to the account that unlocked them.