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Onslaught! Arena is a shooter in the vein of Smash TV, developed by Lost Decade Games and released on December 7, 2010 for the Google Chrome Web Store. The game was later released on the Mac App Store on March 11, 2011. Onslaught! Arena is a medieval styled shooter, where the player controls an unnamed knight in a quest to destroy all monsters throughout 50 increasingly difficult waves. The game has occasional boss battles and high scores as well.

The game is available for $1.99 from either the Chrome Web Store or the Mac App Store.


  • Typing in "HTML5" in the Google Chrome version gives the player a shield with HTML5 branding, that has no effect other than aesthetics.
  • The first version of the game lacked support for saving every level, unlike the current version.

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