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Every rally includes checkpoints like abandoned amusement parks, haunted insane asylums, missile silos, dilapidated buildings, ghost towns, waterfalls, giant tree houses, and usually a diner willing to serve people dressed like horses.
Rental Car Rally is a "navigational and looking handsome" challenge. You win by hitting all the checkpoints in the least amount of distance while looking <chef kiss>.
"Creative, preferably shitty, and comically adorned." We strongly encourage you to create a vehicle that engenders squeals of delight from your fellow competitors, bemused looks from gas station attendants and, in the best cases, jaw-dropped and bug-eyed stares from small town locals.