One of my all time favourite games. Also one of the absolute first games where I developed any interest in doing more than the bare minimum of playing the game on easy and calling it done. I'm working on a perfect play-through right now on my XBox classic. Grade A, three checkmarks, all the medals. Its a lot of fun. The only collectibles are bad guys with handcuff icons above their heads. Its also VERY EASY to max out your primary weapon stats early on, unless you wanna do all three but I stick to the Assault Rifle. If you have an XBox classic or PS2 you can usually find one or two copies of the game floating around retro stores. Pawn shops and Thrift stores don't generally keep digital records though so finding anything in one of them is a time suck. Otherwise you're left to sites like eBay where the prices can get a little high and then theres shipping. Best of luck all.