>>391967809
They've divided up the maps pretty well for the sections of the game. Route is hobo mode, swamp is early game, factory is mid game, and kolhoz is late game.
Hobo mode you can get by with anything, early game you need to have at least bought a better gun and have a grasp on how the game works, mid game you learn about AP and how to manage and prepare for longer raids plus know when to quit, and late game you have to have a very good weapon you're comfortable with and know how to overcome vastly superior forces holed up in secure areas.