Learners need to have their own copy of Core Keeper, the video game.
https://store.steampowered.com/app/1621690/Core_Keeper/

Currently Core Keeper is only available on PC (through Steam), and learners DO need to have their own copy of the game. Core Keeper is an indie adventure pixel RPG still in early access along the lines of Terraria or Stardew Valley. Players adventure in a cavern to find materials, garden, explore, craft, and fight monsters.  

Co-op codes will change every week and be provided upon the start of each class session so that learners can join the group game. The teacher will share a co-op code, which should minimize any personal information shared by learners (such as gamer handles). However, please talk to your learner about cyber security and what should or should not be shared during class (i.e. what names they choose for their characters). This class may use breakout rooms to allow learners to co-op play with others or chat about certain games in smaller groups. In the event breakout rooms are used, the teacher will alternate among rooms to moderate and keep on track, as well as being in game with learners.

Since this class is about meeting together to play cooperatively, learners will need to use teamwork to accomplish common goals and purposes. Learners are asked to give at least as much as they take. Learners who use up excessive resources, destroy or remove items, unleash enemies in inappropriate places, and otherwise intentionally work against the common good or goals (i.e. "griefing") may be removed from the session or the class after verbal warning.