Ladies and Gentlemen
Here is my attempt at recreating the first AVP movie in the game. This will be the first of three scenarios. Please see a picture of the map of the pyramid below.

The predator tiles represent the entrance to the pyramid. This is where the predators start. The round room presents the sacrificial chamber and is one of the starting tiles of the Aliens. The Hibernation room is the Egg chamber and is the second starting tile of the Aliens. The Armory represents the room of the pyramid where the Predator Plasma throwers are stored and is the starting tile of the marines.
Scenario special rulesDoors and VentsThe doors and vents represent the pyramid changing the shape of the labyrinth. AS a result, no model in the game may open or close doors and vents (so no “Weld it shut” and no “Seal the bulkhead”). Instead every two turns the player with initiative rolls a die for each door and vent. On a 1-10 the door or vent is open/accessible on roll of 11-20 the door or vent is closed. Any model caught on a closed vent is destroyed. Doors marked in yellow are open at the beginning of the game. Open doors should be placed next to the border of the tiles it normally separates, so you don’t forget them.
Plasma CastersPlace three objective tokens (Archeological artefacts/Plasma Casters) in the Armory at the beginning of the game.
Victory ConditionsMarinesRetrieve the three artifacts and return to the entrance to the pyramid (carrying a token special rules). Marines win if at least two objective markers are carried to the predator tiles and in the possession of a marine model.
Predators Retrieve the plasma casters so you can begin the hunt. The predators win if at least two plasma casters are captured by Predator models.
AliensCapture five models (Trophy Collection special rules) and carry them to the Egg Chamber.
I haven't had a chance to play test this, yet. So have a read through it, play a round of it and let me know what you think.
Thanks in advance