Unlock Bonuses
When you complete the following campaigns in Single-Player mode under the indicated difficulty setting the corresponding bonus will become unlocked.
Unlock In-Depth Character Profiles #1:
Campaign 1-1 under the Easy difficulty setting.
Unlock Wallpaper Pack #1:
Campaign 1-4 under the Easy difficulty setting.
Unlock Jukebox:
Campaign 2-4 under the Normal difficulty setting.
Unlock Concept Art Pack #1:
Campaign 3-4 under the Normal difficulty setting.
Unlock In-Depth Character Profiles #4:
Campaign 4-4 under the Easy difficulty setting.
Unlock Multi-player Character Cobar:
Campaign 4-4 under the Hard difficulty setting.
Unlock Multi-player Character Evelyn:
Campaign 4-4 under the Normal difficulty setting.
More tricks, tips and cheats for this game are right here - Killzone: Liberation cheats
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