Now, finally, you can fulfill all your gerrymandering dreams with The ReDistricting Game. An intern on our team worked on it - thanks for the link Max!
It’s actually pretty cool. They do a good job of conveying the conflicting goals that turn the process into a machine designed to remove any meaning and weight out of your individual vote. But it’s also fun, which is a rare thing for a game like this. I think I spent half an hour last night trying to optimally solve mission 4 - trying to not only meet the mission goal of creating a new 65% black district and balance the populations of all the districts, keep them contiguous, etc. but also trying to skew existing Republican districts Democratic (muahaha), which was nigh impossible so eventually I settled on just getting everyone to agree on the new district. Good stuff!