Fly a Pelican in Halo Reach

[drake3011]

Bungie originally planned for the player to be able to fly one of gamings most recognisable transport vehicles, but scrapped the concept later in development.

The code was however, well worked on, and whilst not 100% refined, a complex pattern on new Alexandria could allow the player to transform the Falcon into a pelican. The controls are Blocky, and the player can even man the front turret (Granted they clip into the front of the vehicle and cant see anything)

If the same technique is applied in a banshee, it's transformed into a Covenant Phantom

Source