You have to complete the missions on the run and escape the facility.
The map requires AVA mod installed
Level 1:
Close the main gate and reach the next room.
Level 2:
Choose a path to head back to the center of the facility.
Level 3:
Use C4 to demolish the bridge and clear away to the other side of the station.
Level 4:
Escape from the facility through the tunnels, evacuate from the helicopter.
This is a fan map, it does not exist in the actual A.V.A game.