1st place: The Retracting Ice
2nd place: A tie: Helmetlands: Cold Trail & March of the Machines (listed alphabetically)
The normal thing, according to general convention, is to then drop 3rd place, as one of the two that tied would have taken 3rd's spot.
You could give the other two "honorable mention," or add a 4th place finish, which would include both of them as another tie. The former would be better protocol, I believe.