This document provides details for an OP Design Challenge to create new items for the game Octalysis Prime. Participants are asked to design 3-5 items considering how they synergize with existing items and powerups, provide item descriptions and characteristics, suggested prices, and visual demonstrations of interactions. Items should utilize the 8 Core Drives to improve the player experience. Finalists will present designs for the chance to have their item included in the game. The winner will be an item that is both powerful and easy to implement. The deadline is October 5, 2018.