On the pipe that runs along the fence at one side, you must ump on top of there. Prior to this though, a care package has to be dropped on the buunker just at the bend of that pipe and be lodged there to allow you to jump on top of it. Then you get on top of the bunker, shoot the crate and reveal the openeing to the teddy bear.
Rust.
Rust.
free for all. very small map.
red dust is made of rust. That is why they call it "rust".
the names of the maps are rundown, terminal, karachi, sub base, favela, highrise, rust, afghan, derail, estate
the levels are wasteland,karachi,sub base,terminal,afghan,derail,estate,favela,rundown,rust,scrapyard,skidrow,under pass,
afghan derail estate favela highrise invasion karachi quarry rust sub base terminal underpass wasteland
There used to be a glitch on the Rust map where you could try and get into the tunnel, I'm sure you can find a video of the process on most video sharing websites and specialist gaming sites too. I have put one in the related links. This glitch is, however, most likely to have been fixed when Infinity Ward were cracking down on glitches and problems with the multiplayer of Call of Duty: Modern Warfare 2 heavily.
rust
There is: Rust, Overpass, Quarry, Favela, Derail, Sub Base. If I'm missing any then sorry, I haven't played in a while due to a broken PS3.
rust colour
Im not sure in BO but in mw2 on rust you can you go around the perimetre and then there should be a little pipe sticking out of the fence you jump up in there and then look at your map your out o the map