Today i am here with the 5th edition of action game Build and Base. Build most powerful forces, unleash hordes of monster and control your soldiers in this real time strategy war game! Play and enjoy Build and Base 3 on the games 8. How to play Build and Base 3 : Use your mouse to control. Move mouse to left or right screen to scroll the map. Click on the upper box to create a unit, then place your unit around base. Press W or UP to select all units, Press SPACE BAR to un-select all units, Press A or LEFT to move all selected unit back to base. Press CTRL to auto build all available resources, including creating units.