The Redistricting Game takes place in imaginary states named Jefferson, Madison and Hamilton, but its developers are hoping it will draw enough interest and support to warrant making a version that uses real-world maps and census data.
In the last mission of the game, players determine the state of Jefferson’s districts without taking political affiliations into account. That level simulates what redistricting would be like if a bill championed by real-world Rep. John Tanner (D-Tenn.) became law. full article
I will say that the game is very well made and does an good job of showing how gerrymandering works and also how it hurts the democratic process. You can try it for yourself here.