The Lock-On Missile (ロックオンミサイル発射 Rokkuonmisairu hassha?, lit. "Lock-on Missile fire"), also known as Homing Missile Launch (ガン発射 Gan hassha?, lit. "Gun fire") or Homing Missile, is an attack which first appeared in Sonic R. When performing it, the user shoots missiles at a marked target.