Former Third Echelon agent Sam Fisher is at the top of his game, but are you? As you play Splinter Cell: Conviction, your actions are constantly graded in a system called P.E.C.: Persistent Elite Challenges. Each challenge has three tiers, with increasing requirements – but also increasing point payouts. The Prepare & Execute Challenges are a series of moves and kills that require preparation, such as clambering along ceiling pipes to perform Death from Above kills. Use the strategies in this video to nail all 12 Prepare & Execute challenges: Death from Above, Grab From Ledge, 5x Predator, Stealth Headshot, Mark Proficiency, 3x Frag Grenade, Remote Explosion, Stunned, Behind Closed Doors, Sonar Mark, Shadow Takedown, Sticky Camera Whistle. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.