indicates the player start position, facing north.

1. Pass through the Easy Skill selection arch. Just behind the teleporter, on the underside of the rusty metal support, is a shootable switch. This will cause the platform at the corner of the walkway to descend into a basement chamber.

2. Pass through the Normal Skill selection arch. From the middle of the three bookcases behind the teleporter a book protrudes from its shelf. Push the book into the shelf and the whole case opens to reveal an alcove beyond.
Rune One is inside.

3. Pass through the Hard Skill selection arch and step onto the platform in the room beyond. Turn round 180° and look down. In the wall below is a doorway. Wait until the platform is about halfway along it's path and run off into the doorway. Turn right into the chamber.
Nightmare! Skill awaits.

4. Arriving by teleporter in the stargate chamber you can see two metal pillars rising out of the darkness below. Stand at the edge of the walkway and look down. A metal girder is fixed to each pillar at an angle. Drop down onto either of these and turn round. Running carefully along the girders will take you to an exit teleporter.

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