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The Ratchet and Clank Trilogy has been pushed back from May 16, 2012, to early June according to a tweet from Insomniac Games:
The collection is being developed by Idol Minds, the makers of the hit PSN game PAIN, and the upcoming Vita game Warrior's Lair. It will include HD remasters of Ratchet & Clank, Ratchet & Clank: Going Commando, and Ratchet & Clank: Up Your Arsenal, all on one Blu-ray disc."We've been informed the Ratchet & Clank HD Trilogy has been pushed back a bit in Europe to early June. Will share more when we have date".
The North American version of the compilation, titled the Ratchet and Clank Collection is due out later this year, September 1, 2012.