I want a rougelike set in modern times in a modern society. It would play similar to, but not entirely unlike, Cataclysm DDA; there would be a similar vehicle system, similar building layouts, similar character creation, remotely similar skillsets, and similar combat mechanics. The game would have a dynamic campaign, i.e. you get a set of goals established in a random order instead of a preset story (which for rougelikes tends to be
a la NetHack.)
You'd generate a "world" (which is really a city or town), and in a DF-ish way it would create three or so random conflicts based on a set of likes and dislikes with a d2-rolling check line (i.e. if the cops are corruptible, law-abiding, loyal, and have a sense of morals, and the drug dealers are corruptible, loyal, lawless, and immoral, if it rolled a 2 they could end up friends.) For example, there could be cops, a crime gang, a corporate ring, and a selectively involved third party. The cops' values are concretely set far enough from the crime gang and they are definitely foes, they could end up cold or warm with the suits, and the third-party would have completely random values and a higher chance of "secrecy" which would make them invisible to other parties.
Afterward, you'd start playing. You'd generate stats, skills and alignment; other than the three or four others there would also be "civilian". A large enough threshold between skills would give you a profession name influenced by your alignment (i.e. law-abiding computer experts are "White Hat Hackers", lawless [crime or evil corporation] ones as "Black Hat Hackers", and neutrally-tipped third-party or civilians "Computer Experts".) If the threshold was too small, you'd just be labeled (insert Law / Criminal / [unlabeled]) Activist.
Your goals would be building up to eventually dethroning the head of your primary enemy (i.e. Lawful Third-Party characters would try to take down corrupt cops or rich and powerful world-abusing businessmen), whether it be murder, life imprisonment, or a massive scandal to permanently tear their reputation in two. You'd build up to it from a set of ten to twenty or so "quests" selected from a pool of alignment-related goals. (For example, cops would perform detective work and drug dealers would try to do things like wheelin' and dealin' and implicating important cops.) The missions would play out similarly to an episode of a cop show, detective show, (my original idea)
Leverage, or the like.
Certain alignments would work better with certain professions (i.e. police thieves would be less effective than mobster thieves), but you could do it for a challenge run, perhaps.