EA Mobile and Activision have released a pair of App Store games that couldn’t be more different from each other: EA has published Auditorium, which it describes as a “harmonic convergence of color, light, and music,” while Activision has released Call of Duty: World at War: Zombies, which recreates the classic zombie-slaying level from the Call of Duty: World at War console game.

In Auditorium (US$2.99), players guide flowing particles into audio containers, trying to create music as they attract, repel, or deflect the flow while avoiding obstacles. Five acts with up to seven levels in each are included, with several ways to solve each one. Additional puzzles can be purchased in-game.

Call of Duty: World at War: Zombies ($9.99) features the zombie map “Nacht der Untoten” (“night of the undead”), in which players fight to survive inside a barricaded bunker. Up to four players can participate via the Internet or Bluetooth, and players have access to three different control schemes, along with a variety of weapons and power-ups. Achievements and a leader board are also included, and Activision said the game supports future downloadable content.