Argus

Argus is a vertical shooter by Jaleco and conversion of an arcade game originally released in 1986. The players takes control of a space-fighter equipped with a front laser gun and ground bombs. Although the game features power-ups, they follow an unusual and unique formula - tiles on the ground must be destroyed in order to upgrade the main weapon or trigger special events. However, three of these tiles must be destroyed to activate such power-ups - B creates a temporary barrier around the ship,P upgrades the primary weapon and L gives the player an extra bonus at the end of each stage.