清版射击游戏（Shoot 'em up，缩写STG）是射击类电子游戏的子类型。在清版射击中，玩家角色——多驾驶飞船或飞艇——只身突击，在躲避敌方攻击的同时射杀大量敌人。清版射击的设计元素组成没有一致观点。狭义的清版射击要采用航天器或特定类型的角色移动；广义则允许角色步行及多种视角。清版射击考验玩家的速度，并需要玩家记忆关卡和敌人攻击方式。弹幕射击游戏采用密度很高的炮弹。

此类游戏起源可追溯到最早的电脑游戏之一的《Spacewar!》，这款游戏于1961年开发，最终1970年代在电子游乐场发行。但一般观点是将《太空侵略者》创造者西角友宏视为类型发明人。《太空侵略者》1978年首次在日本街机推出。清版射击在1980年代和1990年代早期流行。清版射击在1990年代中期成为小众类型，游戏遵照1980年代确立的惯例设计，且越来越迎合专门狂热者，尤其是在日本。

Shoot 'em up (also known as shmup or STG) is a subgenre of the shooter genre of video games. In a shoot 'em up, the player character engages in a lone assault, often in a spacecraft or aircraft, shooting large numbers of enemies while dodging their attacks. There is no consensus as to which design elements compose a shoot 'em up. Some restrict the definition to games featuring spacecraft and certain types of character movement; others allow a broader definition including characters on foot and a variety of perspectives. Shoot 'em ups call for fast reactions and for the player to memorize levels and enemy attack patterns. "Bullet hell" games feature overwhelming numbers of enemy projectiles.