Completion Bonus
Complete the game and view the credits until they end so the game auto-saves and returns to the 'Title' screen. Then select 'Continue' and let the game run through the credits a second time (don't skip them) so you once again are returned to the 'Title' screen. If you now select 'Continue' when prompted you will begin a new game starting at the first cut scene retaining ALL the upgrades and collectables you had from the previous game.
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