2.If you look on the front of any Brute Chopper there is a weird face.
3.On the last level warthog ride look over to the right as soon as Cortana says, "90% Chief" There you will find the jerk store grunt.
4.Stand in the computer room on High ground for a long time and you will hear halo theme music playing.
5.The last level Warthog ride can also be done in a Mongoose or Brute Chopper. If you make a left instead of turning right at the begining you will find a Mongoose. If you turn right at the beginning but instead of continuing on the path turn left you will find a Brute Chopper.
6.On the level Crows Nest if you continue down the path with all of the trucks and barrels you shoud see two marines having a very funny exchange.
To get all the achievments in Lone Wolves attempt to talk to the other and see if you can all work together and take turns getting every achievment.