TAL: Arctic 3 (PC) | CheatingDome.com |
Achievement | How to unlock |
---|---|
Portal 1 | Complete level 6. |
Portal 10 | Complete level 60. |
Portal 2 | Complete level 12. |
Portal 3 | Complete level 18. |
Portal 4 | Complete level 24. |
Portal 5 | Complete level 30. |
Portal 6 | Complete level 36. |
Portal 7 | Complete level 42. |
Portal 8 | Complete level 48. |
Portal 9 | Complete level 54. |