From publisher blurb:
Modern Dungeon5 is a source book for playing the 5th edition of the world's best known fantasy role-playing game in a modern setting.
There's 5 new classes, designed for modern-era and/or sci-fi settings.
The Augment: Enhanced by science to attain physical perfection, how do they use their near-superhuman physique? Methodologies: Chemical Cowboy, Geneticist, and Jekyll.
The Charmer: Using their personality and appeal to manipulate others, do they serve a cause or just themselves? Archetypes: Commander, Entertainer, Grimace, and Undercover Agent.
The Expert: Specializing in one thing to become the best in the world, what area do they master? Specialties: Debunker, Hacker, Medic, Occult Scholar, and Saboteur.
The Gadgeteer: Creating powerful but unstable prototypes, how will their inventions change the world? Archetypes: Inventor, Operator, and Cyborg.
The Trickster: Confounding and befuddling opponents, are they highly skilled or just really lucky? Archetypes: Everyman, Harlequin, and Tychemancer.
There are also modern-era archetypes for each of the existing classes -- along with updates to their starting equipment and tool proficiencies to keep them current.
To flesh out your character, there's also 25 new backgrounds you can choose from, allowing you to build a character from any walk of life.
Plus rules for car chases, hacking, and a bunch of other stuff that medieval characters could never dream of.