It would be a super hero/villain game.
Its an open ended RPG, you choose your morality (good, neutral, bad) and your power set (mage, mutant, techie, or normal) and back round. You get to build your own base, create other super powered NPCs, and dick around in a city.
The city is dynamic with destructible environments. Thieves steal, banks are robbed, and heroes come to stop them. You can do whatever you wish in the city. It works off a GTA design where the military and even a paramilitary wing of the government becomes involved if you go on an unstoppable crime spree.
Your base is completely customizable. From a choice of locations, to a choice of design. Want a super high tech megabase? A magic sanctuary? or a sewer hideout? you got it. The base can have defenses and if your base is discovered, you must repel invaders from other villains, government soldiers, SWAT teams, and heroes. Civilians who see your base must be dealt with, or they will notify the cops. The items you buy for your base gives you bonuses, and abilities. Magic, tech, etc all have different bonuses and abilities. Some items however can also give penalties. For example, a hangar may provide you with a fighter-bomber or VTOL in battle, but it harms your base's ability to stay hidden and takes up a lot of space. For the "normal," your base gets a gang member and mafia-esque bonuses and power sets. For example, your base may build a designer drug lab, which gives a huge cash bonus.
The heroes, and villains can create their own organizations. The NPCs such as engineers, scientists, and soldiers can be customized to your liking. These NPCs can go on missions that you assign, and success rate is based on their stats and level. These NPCS are also dynamic, and will be found in areas your organization has a heavy presence in. Organizations for NPC heroes and villains can also be created by you to ensure you can have competition if you so choose. If you also choose, you can design the base of NPC Villains and heroes as well that you can raid. Though these bases are hidden, and placed at a random pre-determined location.
You can research using the base's libraries for mages, using the base's labs for techies, and research missions for everyone else. Some missions include stealing a crate of experimental weapons from the government or other organizations, buying research from crooked scientists, etc. These gives you bonuses, new unique weapons to play with, new vehicles, new armors for you and your NPC army, new NPCs, etc.
The game comes with a mod toolkit to allow players to create their own cities, and other assorted goodies. Possible multiplayer so players can battle each other using customized organizations or take them on solo.
Am I doing it right?