Cheat mode (Custom Edition)
Start the game with the "-console -devmode" command line parameter. Press [~] during game play to display the console window, then enter one of the following codes to activate the corresponding cheat function. Note: You cannot enable codes in online games. Also, commonly used commands can be placed in an "init.txt" text file in the main game directory that also contains the "halo.exe". Entries in that file should be made in the same format that they are entered into the console, and will be activated automatically when the game is started.
Debug camera commands
|Toggle instant deaths for enemies that see player||cheat_medusa <0 or 1>|
|Set game speed||game_speed <0-20>|
|Clear console window||cls|
|Toggle unlimited ammunition and no overheating for human weapons and plasma weapons||cheat_bottomless_clip <0 or 1>|
|Unlimited ammunition||cheat_infinite_ammo <0 or 1>|
|Super jumps||cheat_super_jump <0 or 1>|
|Possess touched character||cheat_bump_possession <0 or 1>|
|Invincibility||cheat_deathless_player <0 or 1>|
|Spawn all power-ups||cheat_all_powerups|
|Spawn all vehicles||cheat_all_vehicles|
|Spawn all weapons||cheat_all_weapons|
|Teleport player to current camera position||cheat_teleport_to_camera|
|Save current camera location||debug_camera_save|
|Go to saved camera location, away from player||debug_camera_load|
Use one of the following commands to move the camera, after the "debug_camera_load" has been used.
A: Strafe left
D: Strafe right
Mouse Wheel Up or Down: Movement speed
Start the game with the "-screenshot" command line parameter. Press [Prt Scn] during game play to copy the current screen to the clipboard. You may now paste it into the program of your choice.
Alternate ending sequence
Successfully complete the last level of the game in campaign mode under the legendary difficulty setting. The new ending features a human and alien fighting hand to hand. The human will say "Its over", and then they hug because they know the explosion will kill them both. Also, the FMV sequence of each battle scene will be slightly longer.
Playing under the legendary difficulty setting introduces new dialogue not heard in other modes. For example, after being massacred by a force of Grunts, Jackals and Elites, one of the grunts asks, "Can I have his helmet?". Also, your fellow Marines seem to be a bit more chatty (as well as profane).
Under the legendary difficulty setting, view the entire first FMV sequence. During the sequence, the General says things very differently when compared to the sequence under the easy difficulty setting.