HD-2D is a visual style that combines 2D character designs with 3D environments, creating a unique aesthetic in video games. This approach allows for vibrant, hand-drawn graphics while utilizing depth and perspective from 3D modeling. Games like Octopath Traveler and Triangle Strategy exemplify the HD-2D style, showcasing detailed backgrounds and dynamic lighting effects. This blend of techniques enhances the storytelling experience, making it visually appealing while maintaining a classic, nostalgic feel reminiscent of traditional 2D games.