story line - You play a sparta ( bad @ss betchs in halo) you are a team of 6. you all die 1 by 1. Even yu die. The story to Halo Reach is that aliens are invading Planet Reach and you did't know so now the envasion is almost complete you guys try to stop it but in the end it's too late you all lose and reach is overruned by the aliens.
If you dot know the story line it's best to go play it with our friends co op. only 2 players though i think and 4+ online.
cntrols- http://www.google.com/imgres?imgurl=http://images2.wikia.nocookie.net/halo/images/f/fa/ODST_Controller.jpg&imgrefurl=http://halo3blogs.com/2009/10/19/halo-3-odst-info/&usg=__H7s3y9VWz3mMYXXKzRPXbA9mMWs=&h=370&w=665&sz=156&hl=en&start=0&zoom=1&tbnid=esZrDb3NOeuU7M:&tbnh=106&tbnw=190&prev=/images%3Fq%3Dhalo%2Breach%2Bcontrols%26um%3D1%26hl%3Den%26sa%3DN%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7DMUS%26biw%3D1003%26bih%3D595%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=313&vpy=93&dur=9&hovh=167&hovw=301&tx=139&ty=112&ei=75nITMLmKY-2sAPx-YHDCA&oei=75nITMLmKY-2sAPx-YHDCA&esq=1&page=1&ndsp=12&ved=1t:429,r:1,s:0
Dont listen to what ben31 jumping in midair dont do shet you still die. and spraying is stupid. waste of bullets and gives off your location. if in a big map try to stay back and hide and snipe if close range just keep on lock and fire and charge if you get close whack him dont shoot. unless it;s with a shot gun. or heavy gun like spartan laser or rocket. whackihim 2 times to kill 1-2 times in the back to kill.
When shooting try to aim for the head that gets the easiest kills. usually dead blank in the face is 1 shot kill.