SuperPhillip Central writes, "Shin'en has a stellar track record on Nintendo platforms. You might remember their earliest work with Iridion on the Game Boy Advance, the pair of Nanostray games on the Nintendo DS, and Jett Rocket and F.A.S.T. Racing League on the Wii. Released last year as a retail release, Nano Assault took the world of Nanostray and shrunk it down to microscopic levels. Now, the game has a second chance to shine, and this time it's a much more affordable and enhanced experience on the Nintendo eShop. Dubbed Nano Assault EX, do the extra features make for a game that's worth purchasing if you've played the original?"