Five months ago, modder H1Vltg3 gave us an Iron Man script for Grand Theft Auto IV, and it was already loads better than the official Iron Man moviegame of 2008. With another five months' worth of polish, it's even better.
[Update:] There was some dispute over credit in the original video so the uploader swapped in this one, which features Iron Man in the Heartbreaker armor. There is no audio of Jarvis in this clip.
The original post follows:
Repulsor rays and the chest beam have better sound effects and a lot more oomph. Jarvis talks to you when you slam into the ground or the side of a building. Melee attacks look like someone's really getting hit by powered armor.
Want to play? Download it here.