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What is a Season Pass?
Underground Season Passes are one-off purchases that entitle you to DLC released over a set period of time. This is not a purchase of the full game itself.
Underground Activation Instructions
| Release Date | January 8, 2015 |
| Publisher | GrendelGames |
| Genres | Puzzle, Adventure |
| Themes | Science fiction, Educational |
| Platforms | Wii U |
