Shadowgun looked good when we saw footage of it last month, and at E3 2011 we got to chat with the game's creators about the Tegra-optimized title. Madfinger, the game's creator, worked closely with NVIDIA to wring the maximum performance possible out of the Tegra 2 platform, but it said Shadowgun will still look stunning on other silicon. The game is built on the multi-platform Unity engine and will be coming to iOS and Android devices around the world in September (prices TBD). As you can see in the video above, it runs smooth as silk on an LG G2x (55-60fps) and Motorola's Xoom (30fps). Madfinger said we can also expect 60fps on the iPad 2 and devices packing Kal-El chips, and 30fps on other Android handsets and the iPhone 4 when the game debuts. If you've got a hankering for some more video of the game, check the official trailer after the break.