Start the level by going to the left side of the tower. There is a small raised snow bank. Have one player stand there and a second jump on his head. Then the bottom player jumps and in mid air the top one jumps and the bottom jumps again and when they touch the top player must jump again to reach the ledge. The other 3 players stay at the bottom of the tower The player on the ledge must then take a right and Grenade Jump to the diagonal ledge that leads up the tower. Walk to the top all the way and look to the left to see a diagonal beam faceted to the wall leading upwards toward the snow where Avery Johnson is; jump on it then walk and jump to him and wait as he kills all the Flood. Jump down and when you walk through the door all the other players will be teleported there. Kill 343 Guilty Spark as normal and then head out back to where you were and take a left and down the ramp you will find the Ghosts. Carefully go up the tower and head toward where you find the Warthogs and complete the track as you usually would being sure to keep a tight group and make sure to slow down for those who fall behind. For a fileshare video of what to do, check here. For a Youtube walkthrough by the same person, click here.
