Gaming History 101

Original Platform: Playstation 2
Released: November 12, 2001
Ports: Xbox (Substance), Playstation 2 (Substance), Windows (Substance)
Developer: Konami
Publisher: Konami
Digital Release/Re-Release: Trilogy Box Set (Discs Only – includes Substance version), HD Collection on Xbox 360, PS3, Vita (Vita version can be purchased separately) – All digital and disc, Legacy Collection (includes HD Collection)
Series/Sequels: Metal Gear Solid
Approx Value (according to Price Charting): $3.25 (L), $4.95 (CIB), $29.00 (S)

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Unlockables and Secrets

Far too many to list, here’s the GameFAQ’s complete list

Walkthrough

Link