Steam version of Max Payne 2 is a version cracked by pirate group Myth
Pretty funny, but seems like a perfectly valid approach. Some dude at Rockstar could either code a no-cd workaround himself to get it listed on Steam, or just reuse one that already works (and was extremely well tested by the pirate community). Imagine trying to obtain (and understand) the source code for a game binary released 7 years agoNo brainer if you ask me. He just forgot to remove the credits.