Die Hard 64 is a game for the Nintendo 64. It would be based on the Die Hard franchise.
Die Hard 64 is a first person shooter, similar to Goldeneye 007 on the N64.
Why it was Cancelled
The project would have released far too late into the N64’s life cycle.
The game would be remade for the Gamecube and released as Die Hard: Vendetta. However, recently the ROM(s) of the game have been dumped.