1. | Architecture of Portal #5: Fool-proof Puzzling | 4 | | Portal 2
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2. | Architecture of Portal 2 #11: Hard Light Bridges | 5 | | Portal 2
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3. | Architecture of Portal 2 #8: Aerial Faith Plates | 6 | | Portal 2
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4. | Architecture of Portal 2 #10: Multi-stage Puzzles | 6 | | Portal 2
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5. | Architecture of Portal 2 #25: Faster | 6 | | Portal 2
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6. | Architecture of Portal 2 #13: Keeping Things Interesting | 6 | | Portal 2
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7. | Architecture of Portal 2 #34: Just Solving Puzzles | 6 | | Portal 2
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8. | Architecture of Portal 2 #6: Fixer-Upper | 6 | | Portal 2
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9. | Architecture of Portal 2 #22: Fewer Clues | 6 | | Portal 2
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10. | Architecture of Portal 2 #7: Thermal Discouragement Beams | 7 | | Portal 2
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11. | Architecture of Portal 2 #9: Emanciaption Grills | 7 | | Portal 2
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12. | Architecture of Portal #2: The Art of Teaching | 7 | | Portal 2
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13. | Architecture of Portal 2 #38: Into the Lair | 7 | | Portal 2
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14. | Architecture of Portal 2 #32: Excursion Funnels | 7 | | Portal 2
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15. | Architecture of Portal 2 #12: Reintroduction to Turrets | 7 | | Portal 2
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16. | Architecture of Portal 2 #20: 1952 | 8 | | Portal 2
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17. | Architecture of Portal 2 #36: Smashing Screens | 8 | | Portal 2
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18. | Architecture of Portal #10: O Snap Plot Twist | 8 | | Portal 2
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19. | Architecture of Portal 2 #31: Gotta Test | 8 | | Portal 2
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20. | Architecture of Portal 2 #24: 1971 | 8 | | Portal 2
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21. | Architecture of Portal 2 #3: Steeper Learning Curve | 8 | | Portal 2
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22. | Architecture of Portal 2 #2: Rediscovering the Portal Gun | 9 | | Portal 2
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23. | Architecture of Portal 2 #21: Repulsion Gel | 9 | | Portal 2
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24. | Architecture of Portal #7: Now with More Bullets | 9 | | Portal 2
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25. | Architecture of Portal 2 #15: We are Escaping | 9 | | Portal 2
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26. | Architecture of Portal 2 #37: We are Escaping Again | 9 | | Portal 2
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27. | Architecture of Portal 2 #1: Rise and Shine, Chell | 10 | | Portal 2
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28. | Architecture of Portal 2 #14: Open Room Puzzles | 10 | | Portal 2
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29. | Architecture of Portal 2 #30: Leaving the Underworld | 10 | | Portal 2
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30. | Architecture of Portal 2 #33: Fatty Fatty No-Parents | 11 | | Portal 2
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31. | Architecture of Portal 2 #26: Subtle Guidance | 12 | | Portal 2
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32. | Architecture of Portal 2 #39: Fly Me to the Moon | 12 | | Portal 2
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33. | Architecture of Portal 2 #5: Rise and Shine, GLaDOS | 12 | | Portal 2
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34. | Architecture of Portal 2 #19: Foundations | 13 | | Portal 2
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35. | Architecture of Portal 2 #29: Going Up | 13 | | Portal 2
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36. | Architecture of Portal 2 #4: Wheatley | 13 | | Portal 2
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37. | Architecture of Portal 2 #27: 1981 | 14 | | Portal 2
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38. | Architecture of Portal 2 #28: White Goo | 14 | | Portal 2
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39. | Architecture of Portal 2 #23: Bouncing Cube | 14 | | Portal 2
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40. | Architecture of Portal 2 #18: O Snap Plot Twist | 18 | | Portal 2
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41. | Architecture of Portal 2 #17: Potatoes | 19 | | Portal 2
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42. | Architecture of Portal 2 #35: Core Meltdown Imminent | 20 | | Portal 2
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43. | Architecture of Portal 2 #16: Turret Factory | 106 | | Portal 2
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