3D Printers

The 3D Printer is a new mechanic in Risk of Rain that allows players to have some control over their items, and by extension their build. The 3D Printer will appear as a large blue box that displays the item to be printed, with a chute on one half to take an item in exchange. Using the 3D Printer will exchange one of the player's existing items for the displayed item, instead of a monetary cost. The item taken will be randomly selected from owned items of the same rarity as the item to be printed. The Printer will not take the item on display (converting the item into itself) until the player has nothing but that item remaining.

For example, if a Soldier's Syringe is on display, a random item of white rarity will be removed from your inventory and will be replaced with a Soldier's Syringe drop. The 3D Printer can be interacted with indefinitely, but once you have nothing but the item to be printed in your inventory interacting with it simply replaces the item with a copy of itself. So, in the previous example, if you have seven items of white rarity, not including the item on display, you can use the 3D Printer seven times for seven syringes. Using the Printer additional times will result in a syringe being turned into a syringe.

Using the 3D printer seven times will grant the "...maybe one more" challenge and will unlock the "Fireworks" item. However, while it is possible to use the 3D printer with the same item over and over, such as turning syringes into syringes, it will NOT count for the seven duplications needed. 3D printers will often have common items on display. However, you can find 3D printers for uncommon, and even legendary items.