The "Trading post" building has been added to the game.
In "12 wave" this building will be opened.
In the first 8 maps, from "12 wave" will spawn 3 items on random places in map.
Each item have own 4 places for spawn.
Places for spawn are in buildings.
Each location has a 33% chance to spawn.
Each item adds 2000 points.
Random spawn of items is at the start of each new wave.
A player can carry only one item of each type.
