There are little things here and there. The names of some guns that seem to have been made for multiplayer, but were never implemented can be found, for example. There is, however, very little of what would have become Prophecy's multiplayer game in what was released. The Prophecy team didn't really do very much work on the multiplayer aspect, which is why it would have taken so much longer to finish the game if they were to put multiplayer in.
TC