Blueprints are items in Let It Die. They are found in lockboxes lying around in the Tower of Barbs, or left behind by defeated Tubers or bosses. Kommodore Suzuki uses blueprints, along with materials collected by the player, to develop new weapons and gear. He will then begin selling these items at his store, Choku-Funsha, in exchange for Kill Coins; they can be purchased any number of times. This is very useful, as weapons and gear manufactured by Kommodore Suzuki are generally of far higher quality than what can be scavenged in the Tower of Barbs. If the player gives Kommodore Suzuki a blueprint to an item that has already been developed, he will buy it for a few Kill Coins, even though it is of no particular use to him.