Hard mode:
Highlight the "One Player" option at the title screen. Then, hold Square +
Circle + L1 + R2 + Select + Up + X.
Level select:
Pause game play and highlight the "Map" option. Then hold Right + L2 + R2 +
Circle + Square + X. Enter the options screen and select "Cheats". Alternately,
successfully complete the game to unlock the level select option.
Movie theater:
Pause game play and highlight the "Briefing" option. Then, hold Right + L1 + R2
+ Circle + X. Alternately, successfully complete the game to unlock all but two
of the game's movies. The final two movies are unlocked when the game is
successfully completed under the hard difficulty setting.
Rockies multi-player map:
Find the H11 sniper rifle on the first level (Colorado Rockies) to unlock the
Rockies multi-player map. The H11 is near the waterfall and ice arch where you
first meet Chance. Instead of jumping over the waterfall chasm, hang from the
edge of the chasm and drop down into the tunnel. The H11 is in there.
Additional multi-player characters:
Find the M-79 grenade launcher on the second to last level (New York Sewers) to
unlock the following seven multi-player characters: Ninja Gabe, Scuba Lian, Unit
1 (armored trooper from the Bio-Lab Escape level), Dr. Elsa Weissinger, Uri
Gregorov, Lawrence Mujari, and SWAT officer (helped in the New York Slums
level). The M-79 is near the end of the level (in the parking garage). Near the
top of the stairs is an open doorway into the parking garage, where a black van
is driving past. Instead of exiting the stairwell at that location, keep
climbing up the stairs. There will be five Agency operatives scattered on the
landings above armed with silenced HK-5s, grenades, and M-79s. Use the M-79 to
clear them out. The M-79 is on the top landing.
