Bungie's classic shooter. But that may not happen for Halo.

Bungie's game, of course, is set in a 3D environment. As such, chat users must not only move Master Chief around obstacles, but also aim, shoot, and fire weapons to kill enemies. When hundreds of people are triggering commands at once, this leads to some pretty hilarious--and painful--results.

Twitch Plays Halo has been running for more than 20 hours now, but progress has been slow. At the time of writing, users were trying to get Master Chief across a pretty narrow bridge. Watch the video above to see how things are shaping up now.