Actually, there's no ending in the game, but it does reset itself to zero after the player reached the highest possible score (99,999). T-Rex Dino is an endless runner game. If you're wondering whether there are more levels, or a final level, or someone to fight  nope, there's none of that.

An Intel Core 2 Duo E8200 CPU is required at a minimum to run Black Ops 2. BO2 system requirements state that you will need at least 2 GB of RAM. Provided that you have at least an ATI Radeon HD 3870 graphics card you can play the game.

Amazon: Call of Duty: Black Ops II - PC : Video Games.