Mine was stubbs the zombie a month before the 360 came out. I say xbox because people are still buying PS2 games and a lot of you have probably brougt persona 4.
Just to confirm I mean xbox not xbox 360

" Would downloaded xbox originals off the 360 count? if so, it would be Indigo Prophecy.  Which is my first and only Xbox game actually =P "

Splinter Cell Double Agent while my 360 was in for repair. I heard it was the better version of Double Agent I wouldn't hotly contend that. Developed by the Montreal Studio while Shanghai did the 360 version; they are completely different games and any Splinter Cell fan worth his/her salt should play it at some point.

I'm trying to think...
I got a free copy of PGR2 at a pawn shop.  Was looking at the games they had for the original Xbox since I couldn't see anything that I really wanted that I could afford, and I saw that the price on it was $0.00.  I asked, and they said that it was free, so I took it, because I do love that game.  But for some reason, the radio feature doesn't work.  When you put the music source on radio, there is no music.  But, hey, free game.
I remember I bought a Sega GT 2002/Jet Set Radio Future combo pack for a few bucks because I wanted to play Jet Set Radio, but I wanna say it was probably Street Fighter Anniversary Collection.

Brought where? What do you mean? At first I thought it was a typo but then in your post you say brought again. Esplain

i borrowed an xbox from my cousin and the last game i remember buying for it was Dead or Alive 3, though i gave it to him when i gave back the xbox. 
that game was awesome, i used to play that game all the time at my friend's house before i bought it, and it's probably one of my all time favorite fighting games 

Last game I bought was The 3rd Prince of Persia game. I believe the subtitle was Two Thrones?

Last Xbox game would probably be Splinter Cell Double Agent

Gladius

I rebought the Xbox 1 version of Halo 1 about 3 months ago, lol.

I actually bought Fatal Frame and Fatal Frame: Crimson Butterfly, quite recently. Though I'm planning on trading them in fairly soon.

" Brought where? What do you mean? At first I thought it was a typo but then in your post you say brought again. Esplain "

Far Cry.  It was awful.  Never finished it.  The unlimited enemy respawns were to much.  I was so snobby about it, I quit.
 
  A game system that archaic has no place in any gen. past SNES/Genesis.  I wont even play CoD 4 campaign.  It's just so damn lazy and slack of the game Devs.  SO cheap....  

 
Forza Motorsport 1.

I dont remember specifically, probably Jade Empire. I cant play any of them now though I really should get another xbox.