You will be asked to choose a difficulty level, just go back and choose Current Game and you will see every level get unblocked without points or rankings.
This is the easiest way to unlock every level without messing up with game files. Make sure you create a backup copy before editing game files. You will see a level select menu where you can play any mission you want.
Here are some Hitman 2 cheats and unlockables that can make your gameplay experience more fun and exciting: How to Unlock Bonus Weapons and Missions in Hitman 2 Silent Assassin?
There are loads of weapon unlockables if a player achieves a status. This game is no button mashing shooter as it rewards the thinking player. Players are awarded with ranks like “Silent Assassin” or “Mass Murderer” based on their ways or ideas of completing a mission. This tactical stealth-based shooter video game works on a novel concept of ranking players. It was developed by IO Interactive and published and released by Eidos Interactive on Octoin North America on Microsoft Windows, Xbox, GameCube and PlayStation 2 platforms. Hitman 2 Silent Assassin is the second game of the Hitman trilogy.