Hitman: 2
Top of the Class
Difficulty: 2/10
To get this trophy is pretty simple. All you need to do is create a new contract under the contract creation menu and play it while trying to get the least amount of points possible. You then want to replay the mission and achieve a better score, beating your previous score and putting your new score on top of the leaderboard for your created contract.
Alternatively, you could play a featured contract or one made by another player and beat the high score, however, this will take more skill.