This page contains Onslaught Unlockables for Nintendo Wii called "Ultra difficulty" and has been posted or updated on Feb 20, 2009 by ArchDuke.
- Developer: Hudson Entertainment
- Publisher: Hudson Entertainment
- Genre: Action Shooter First-Person
- Release: Feb 23, 2009
- ESRB: Teen
Finish the game on Expert difficulty.
If you know other secrets, hints, glitches or level guides, then please Submit your Cheats and share your insights with other gamers.