 Light gun shooters primarily revolve around shooting large numbers of enemies attacking in waves . The protagonist may be required to defend himself by taking cover , or by shooting incoming thrown weapons , such as axes or grenades . The player may also compete against the clock , however , with some games also featuring boss battles . Games may also reward the player for accurate shooting , with extra points , power @-@ ups or secrets . Games which do not pit the player against antagonists instead feature elaborate challenges constructed mainly from inanimate objects , testing the player 's speed and accuracy . More conventional games may feature these types of challenges as minigames . 
