The Jar of Radioactive Particles is an accessory in The Mad Murderer.

The player can open the jar and out comes yellow glowing specks (that, just to be clear, are NOT fireflies, they are radioactive particles) that float in the air.

The jar used to cost 50 credits per round and 3,000 credits to buy permanently, but after the XMAS Update, it could only be bought permanently.

Shop Description

"No, they are not fireflies! Don't come back to me crying afterwards!"