Our previous glimpses at Zipper Interactive's Handheld social shooter focused on Unit 13's firefights and social network elements. But a new demo video from the CES floor focuses on the sneakier side of thing in by highlighting the military action title's Covert missions. The actual gameplay starts at about 2:26. You'll be able to creep on bad guys when Unit 13 comes out on March 7th, just after the Vita launch.