Trigonarium Steam CD Key Platform: Steam Release Date: 31/08/2015 Product Description Trigonarium is a hardcore twin-stick shooter for fans of challenging arcade gaming. Fight your way through multitudes of enemy formations in constantly shifting battle arenas to face the colossal level bosses. Features Original campaign, a 3 world arcade mode to introduce you to the world of Trigonarium Ultimate campaign, a 5 world super intense experience to push your skills to the limit Challenge modes for…