Onslaught Cheats

 

Onslaught Cheats

 

Upgrade locations

Each weapon (including grenades and the whip) has 2 upgrades that count as additional weapons. The upgrades carry over even if you start a new game on another difficulty (on the same save spot).
Unlockable How to Unlock
2nd level Assault Rifle Box in Mission 5
2nd level Grenades Clear Missions 1, 2 and 3 in Normal difficulty (S rank)
2nd level Rocket Launcher Clear Missions 9, 10 and 11 in Normal difficulty (S rank)
2nd level Shotgun Box in Mission 11
2nd level SMG Box in Mission 3
2nd level Whip Clear Missions 5, 6 and 7 in Normal difficulty (S rank)
3rd level Assault Rifle Beat the game in Ultra difficulty
3rd level Grenades Clear Missions from 1 to 8 in Hard difficulty (S rank)
3rd level Rocket Launcher Clear Missions from 1 to 12 in Ultra difficulty (S rank)
3rd level Shotgun Beat the game in Expert difficulty
3rd level SMG Beat the game in Hard difficulty
3rd level Whip Clear Missions from 1 to 8 in Expert difficulty (S rank)

Extra difficulties

In addition to the three difficulty settings available from the start, there are two unlockable difficulty settings.
Unlockable How to Unlock
Expert difficulty Finish the game on Hard difficulty
Ultra difficulty Finish the game on Expert difficulty