in my opinion halo 3odst
no
No you do not have to have halo3 to get halo3 odst.I have heard a few bad reviews of it but most are good so i suggest people should get it.
of course
Yes
halo3 odst is an expansion of halo3 the only big difference is that you no longer play as a Spartan you play as an odst.
yes
Its called highway
To get the recon armor you have to complete all the vidmaster achievements in halo3 and halo3 odst.
Yes, A. K. A. Halo Recon. It is just an expansion to Halo 3 though, where you play as one of the semi - spartans. Actually halo3 ODST is set at the same time as halo3 because the war finishes at the end of halo3 and ODST isn't recon its orbital drop shock trooper. You get recon by completing the campaign.
Personally i would get odst but that is just my opinion
In Halo 3, you play as the Master Chief, the last surviving super-soldier of the Spartan II group. In Halo 3: ODST, you play as an ODST instead of the Master Chief. There are also different weapons in ODST.
personally i like halo 3 better then all of halos so far. halo 3 is better because you are able to play agenset people on xbox live but halo odst is better in the sence that the story line makes more sence then all other halos.