#shoot-em-up "Defender" is primarily a side-scrolling shoot 'em up game. In this genre, players control a spacecraft and navigate horizontally, blasting waves of enemy invaders while avoiding their attacks. The objective is to survive as long as possible and score points by shooting down enemy ships. #horizontal-scrolling "Defender" features horizontal scrolling, as the game world moves from right to left. Players need to fly their spacecraft across the game's expansive landscape, rescuing humans and defending against alien attackers. #arcade This game is a classic arcade-style title, known for its intense and often unforgiving gameplay. It's designed for short play sessions where players aim to achieve high scores. #action "Defender" is action-packed, requiring players to make split-second decisions, shoot enemies, and rescue humanoids. It's fast-paced and demands quick reflexes. #space-themed The game is set in outer space and features various types of alien spacecraft, making it a space-themed shooter. #defender-of-the-earth The title of the game suggests the role of a defender, and indeed, players are tasked with protecting humanoids from alien abduction. This adds an element of protection or defense gameplay to the action.