All characters
Make sure to tell the other characters to support you when attacking a frag
When in combat tell your teammates to fire at will move around a lot and throw grenades when there are a lot of aliens grouped together
Always pair one guy with one girl when playing regularly
To clear out a lot of enemies have Tex and Brutus go in and do as much damage as possible Then retreat back to Flint and Hawk Also have Flint give you sniper support and have Hawk cover Flint It also helps to send Hawk in invisible to scout and kill as much as possible
When going into any hallway or cave keep Flint back but able to snipe clearly into the hall or cave Put Brutus on one side and Tex on the other outside of the hallway Have Hawk explore and if needed lead the enemies out They will be blown away from front left and right and from Hawk
Character Gets
Put in one of the following names for your profile name
BRUTAL Brutal Difficulty
DBLDAY Die fast
DEADAIM Aim better
ERINROBERTS Better Defense
HVYMTL Get Cartoon Mode
MATTSOELL Tougher Characters
RAPIDFIRE Rapid Fire Weapons
SPRAGNT Stupid AI
WIMP
Go to cheat menu and enter
BRUTAL
to get a harder difficulty put complete game on this hardness and SAVE IT then you can play it with 5 weapons
on game hold down on Y to go though weapons