A FPS (First-Person Shooter) developer designs, codes, and creates video games focused on gun and other weapon-based combat through a first-person perspective. They conceptualize the game's theme, story, characters, and environments. They develop game mechanics, including player controls, enemy behavior, and combat systems. They also create realistic graphics and sound effects. They often work in a team with artists, writers, and other programmers, using game development software. Additionally, they conduct testing, fix bugs, and make adjustments for improved gameplay. Their goal is to create an immersive and engaging experience for players.