In order to get multiple "Reach level ? with ? Karma" trophies, try remaining neutral for the duration of the game. When you are getting close to one of the notable achievement l, or 20), save the game and turn evil or good by completing a quest that gives you good karma or murdering random characters. This will send you into the good or bad karma statuses while giving you experience. Once you get the achievement for reaching evel with bad or good karma, reload your saved game and continue as usual with neutral actions. It is easier to neutrally level somewhere with a lot of enemies, such as the D.C. area with Super Mutants, or subways or caves with Ghouls and Mirelurks. Note: Using this trick is easier with a neutral/bad character because once you get close to reaching a notable level, you can just go to Megaton, Rivet City, or another major settlement and kill people to get experience. After leveling, reload the game and no one will be mad at you.