Halo

Driving Warthogs
When driving a warthog before you drive off a cliff spin right away to the side and the warthog won’t tip but will stay horizontal and land from and height. (this won’t work if the cliff goes off that certain level).

Also when turning to make a perfect turn, only do lots of little movements on the right thumb stick. Do this so that the warthog doesn’t skid out from big turns and you can control it better.

Secret Cave
There is in level 5 a secret cave at the button of the map entrance. It comes out on the side where they are not expecting a side attack from that side and it shall be easier.

New Ending
Finish the game using legendary difficulty setting in Campaign Mode

Plasma Grenade
If your going to use a plasma grenade, try throwing the grenade on the alien where it sticks onto them. It will blow up on them making sure it will kill the alien. Also the aliens can do this to you if you don’t move.

---

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.

Effect Code
Toggle instant deaths for enemies
that see player cheat_medusa

Set game speed game_speed
Clear console window cls

Toggle unlimited ammunition and no
overheating for human weapons and
plasma weapons cheat_bottomless_clip

Unlimited ammunition cheat_infinite_ammo
Super jumps cheat_super_jump
Possess touched character cheat_bump_possession
Invincibility cheat_deathless_player
Spawn Warthog cheat_spawn_warthog
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

Quit game quit

Debug camera commands:
Use one of the following commands to move the camera, after the
debug_camera_load has been used.

W: Forward
S: Back
A: Strafe left
D: Strafe right
R: Up
F: down
Mouse: Turn
Mouse Wheel Up or Down: Movement speed

Screenshots:
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.

Alternate dialogue:
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.