Train picks up where Depot left off. You are on a mission to rescue Natalya and escape, picking off enemies and doing other objectives along the way. This is one of the tougher missions in the game, not because of the enemies, but because of the ending. This will be divided into three parts, for each agent difficulty. The only things that change for each agent difficulty are the number of objectives, and the enemies within being more smarter and able to take more rounds. The Silver PP7 cheat is unlocked by completing this mission on 00 Agent in 5:25 or less.