No. Halo is for PC and XBox.
As High Altitude Low Opening (HALO) is from Microsoft and PS2 is Sony the answer is No
no, halo is a Microsoft only product.
Area 51
You cannot unlock it for PS2. It was a free downloadable song for Xbox 360 and PS3, meaning PS2 users cannot get it.
Well there are a few games that are similar to Halo for it. Area 51 (RATED M) Star Wars Battlefront (RATED T) Star Wars Battlefront 2 (RATED T) (Ill update when I find more) I also am in contact with someone who claims to have a prototype of halo for ps2 released in some areas before Bungie became a Microsoft only company.