There are many unused or unfinished vehicles in the game's files. These include a motorcycle with a sidecar, two monster trucks, a bulldozer, a tank, a tractor, and even modern day vehicles.
The Palermo Club originally had a much different appearance than in the final game.
Tommy originally wore a different outfit in the chapter "Election Campaign".
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Spoiler:Paulie's death in the final chapter, "The Death of Art", was revised multiple times, but all versions originally had Paulie lying dead on his bed, and not near the door.
Paulie had a very different facial appearance during development, along with a brown suit.
