David O'Reilly is an Irish artist and animator known for his unique style that blends 3D animation with a minimalist aesthetic. He gained recognition for his work on various video games and short films, often exploring themes of technology and human experience. His projects frequently feature abstract visuals and playful narratives. O'Reilly's notable works include the video game Mountain, which allows players to experience life as a mountain, and the animated short film Please Say Something, which explores the complexities of relationships. His innovative approach has made him a prominent figure in the fields of animation and interactive media.