Sonic Speed Run is a free online endless runner where you control Sonic through a fast-paced 2D pixel world, collecting rings and avoiding obstacles as long as you possibly can. The game pulls straight from classic Sonic energy – quick reactions, tight jumps, and that constant pressure of knowing one wrong move ends your run. It runs right in your browser with zero downloads or installs required.

Every run throws hazards at you in increasingly tricky patterns, so memorizing the rhythm of the obstacles is key to pushing your highscore higher. Rings are scattered throughout the course, and grabbing every last one separates average runs from record-breaking ones. The retro pixel art style keeps things clean and readable at high speeds, so you can actually focus on reacting rather than squinting at cluttered graphics. Your goal is simple: survive longer, score higher, repeat.

This game is perfect for fans of classic Sonic games, retro pixel platformers, and anyone who loves chasing leaderboard scores in single-player arcade-style challenges. If you enjoy free online endless runner games, 2D highscore runners, or retro jump-and-dodge games playable in browser, Sonic Speed Run delivers that satisfying loop of quick sessions and constant improvement. Great for short breaks or long score-chasing sessions alike.