In the game Orcs Must Die 3, after players enter the game, they can find and click on a level, then choose to play, then enter the map of the level, then press B to open the defense device system, and finally click to change the defense trap to complete.
1. First, players need to enter the game on their device, then find and click on a level , and then choose to play .
2. Then players need to enter the map, and then players need to press B to open our defense device interface .
3. In the end, players only need to click to replace the defensive trap .
