The Xbox 360 version of “Grand Theft Auto IV” has 50 official Achievements. But no list of Achievements can tabulate all of interesting things you can do in a “GTA.”

Here are several things I achieved in my first seven hours in the game that you can strive for too, if you get the M-rated game once it launches Tuesday..

100% Unofficial Extra “Grand Theft Auto IV” Achievements

• Caught A Visual Joke Reference To Master Chief
• Saw Reflection Of The Elevated Train In The Hood Of My Car While Driving In First-Person View
• Walked Into a Six-Star Wanted Rating
• Watched a Pantomime Cowboy — Really!
• Heard a Character Say The Words ‘Hot Coffee’
• Used A Car to Knock A Cup Of Coffee From Someone’s Hand — Without Knocking The Person Off Their Feet
• Lost Niko’s Hat

Most of these things wouldn’t have been possible in previous “GTA” games. A lot of them are physics-dependent. Not all of them, though. Not the Master Chief thing.

So why stop at 50? If ever there was a game so rich with possibilities in its world that gamers could make up their own list of Achievements, “GTA IV” is it.