Overview
2 official maps for Dead Man Walking mode.
Download link
Remedy published 2 additional maps for Dead Man Walking mode a couple of weeks after release.
These are not included in the Steam version (or any other as far as I know), but still can be downloaded from 3DRealms’ legacy website, hosted by Rockstar.
They are called “Upper East Side” (played with Max) and “Mona’s Playground” (played with Mona).
Link: Click here to download[www.rockstargames.com]
The file is less than 12 Mb, contains an installer and a readme, pretty self-explanatory.