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| 1: Starting off |
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| 2: Working upwards |
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| 3: Later levels: Sentinel has friends! |
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| 4: Sentinel's Stare. |
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| 5: A starting position in difficult terrain |
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| 6: A 'map view' of a landscape |
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| 7: A view to the top |
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| 8: Zoom, zoom, zoom |
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| 9: Spectacular mountain landscape |
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| 10: Scanning: well-hidden? |
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| 11: Tougher levels, more Sentries! |
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| 12: No energy, scan imminent! Must transfer! |
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| 13: Hard terrain. Keep your options open |
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| 14: The Sentinel sees you from afar |
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| 15: Moving to hide |
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| 16: Get out of that one... |
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| 17: Map View shows it's safe for now. |
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| 18: Sometimes close moves are best. |
