Madfinger Games, the Czech Republic-based company behind Samurai II: Vengeance, has just announced Shadowgun -- a futuristic, shoot 'em up game for Tegra 2-equipped Android phones and tablets. Available on both the Tegra Zone app and Android Market, Shadowgun promises to bring console-quality graphics and performance to mobile platforms -- presumably with the extra geometric detail and high-res textures we've seen in other Tegra 2-tailored games. Madfinger is also developing a version for devices