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What is a Season Pass?
Portal 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.
Portal Activation Instructions
| Release Date | N/A |
| Publisher | Nexa Corporation, Activision |
| Game Modes | Single player |
| Player Perspectives | Text |
| Genres | Adventure |
| Themes | Science fiction |
| Platforms | DOS, Mac, Commodore C64/128/MAX, Amiga, Atari ST/STE, Apple II |
