YouTuber Ocelot has analyzed the various versions of Half-Life 2, highlighting significant differences among them. The retail version was enhanced during its re-release in the Orange Box, which included a higher-resolution Alyx. The game received a major update for its 20th anniversary, featuring improvements such as better lighting effects, refined fire and blood visuals, changes to G-Man's eye design, and variations in cloth texture shininess. Notably, the original version lacked on-screen chapter titles. Ocelot also discussed the evolution of gameplay elements, specifically the buoyancy puzzle in Route Kanal, which was more challenging in earlier builds but has been simplified in the current version. Additionally, he explored console ports and a rare Japanese arcade version that included multiplayer and a condensed story mode.