Unleash your reflexes in Alien Clicker Ultimate Challenge! Race against time in Highscore Mode or master precision in Speedrun Mode. Click swiftly and accurately as red aliens pop up, and aim to outscore your rivals. Perfect for a quick, energetic thrill that keeps you hooked for hours! Alien Clicker, Clicker Game, High Score, Speedrun, Reflex Game, Arcade, Free Clicker, Mobile Game, Addictive, Refelx, Ultimate Challenge, Pop Aliens, Score, Leaderboard