Half-Life: Decay [PS2] - Bonus Level - Chapter 10: Xen Attacks (Walkthrough)
After completing the campaign for Half-Life: Decay and with an "A Grade" for both players in each campaign (or through a cheat code), you can unlock a bonus level where you play as Vortigaunt Drones X-8973 and R-4913. Both Drones are sent to Earth from Xen to find crystals that are being stolen at Black Mesa by the Military and to kill the thieves and recover the stolen crystals. Along the way, the Drones encounter explosives, turrets, and Black Ops Soldiers, which are struck down by the powerful shocks (and claws) that Vortigaunts can deliver attacks from!
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PLAYSTATION 2 CHEAT CODE TO UNLOCK THIS LEVEL (Requires 2 controllers with separate inputs. "P1" denotes the Player One controller whereas "P2" denotes the Player Two controller):
[P2] R3, [P1] L3, [P1] UP, [P1] UP, [P2] DOWN, [P2] DOWN, [P1] LEFT, [P1] RIGHT, [P2] LEFT, [P2] RIGHT, [P1] X, [P1] O, START
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Check out the entire Half-Life: Decay Playlist here: https://youtube.com/playlist?list=PLLzzXgcaGPhm95x2jccUXdU6bSZMX8Vyo
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