This video game The Hobbit was released in 2003 which is 26 years after the 1977 cartoon movie "The Hobbit" was released and 9 years before the Live action 2012-2014 remake of "The Hobbit" was released in 3 parts in a trilogy.
In the games files, an unused boss fight against a troll can be found and inserted. It is in playable condition and occurs after bilbo has placed the last cog pieces in "over hill and under hill." Where bilbo normally acquires the troll key in an area with small enemies, a troll was originally planned to appear as a boss, with bilbo agitating ( hitting) him into charging into stone pillars which would hurt him, until finally dying.