Secuity disablation
In order to get into the map room you first need to dis able the security system inside
Instead of going up and getting locked out try this
Do the mission in reverse first disable the security system then enter the map room it may make you work a little but trust me it is a lot easier than getting locked out I promise you that
More tricks, tips and cheats for this game are right here - Halo: Combat Evolved cheats
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