Top iPad game apps: Angry Birds Space, N.O.V.A. 3 lead platform sales

[In this weekly column, Gamasutra rounds up the most popular paid and free iPad gaming applications on the App Store as of today, with N.O.V.A. 3, Angry Birds Space and Highway Rider currently ranking among the platform's top downloads.] This week's top paid titles are: 1. Angry Birds Space HD (Rovio, $2.99) 2. N.O.V.A. 3 (Gameloft, $6.99) 3. Draw Something (OMGPOP, $1.99) 4. Ski Safari (Defiant Development, $0.99) 5. Where's My Water? (Disney, $0.99) 6. Robbery Bob (Chillingo, $0.99) 7. Cut the Rope HD (ZeptoLab, $1.99) 8. Angry Birds HD (Rovio, $2.99) 9. Kingdom Rush HD (Armor Games, $0.99) 10. LostWinds2: Winter of the Melodias (Frontier Developments, $3.99) Gameloft's first-person shooter sequel N.O.V.A. 3 challenges Angry Birds Space HD for the top spot in today's paid app rankings, as last week's chart winner Ski Safari falls to fourth place. Chillingo's recently released stealth title Robbery Bob makes its chart debut at sixth place, while Frontier Developments' WiiWare-ported platformer LostWinds2 launches this week at tenth. Here are this week's top free iPad applications: 1. Highway Rider (Battery Acid Games) 2. Logos Quiz Game (AticoD) 3. Rope'n'Fly 3 (Robert Szeleney) 4. Swordigo (Touch Foo) 5. NinJump Deluxe HD Free (Backflip Studios) 6. Draw Something Free (OMGPOP) 7. SpongeBob Diner Dash (Nickelodeon) 8. Deer Hunter Reloaded (Glu) 9. Words With Friends HD Free (Newtoy) 10. Death Rally (Remedy) Battery Acid Games' motorcycle racing title Highway Rider takes top honors during a limited-time free download promotion, leaving former chart-topper Logos Quiz Game at second place. Soosiz developer Touch Foo claims fourth place with its newly launched platformer Swordigo, as Remedy's Death Rally ranks in at tenth after recently becoming a free download.