Take one of the most beloved PC franchises and completely and disastrously ruin it and that is the new Sim City. 

Set aside the huge pain in the ass always online requirement, and the terrible server issues and the game is still extremely buggy. There are extreme AI pat finding issues that make creating a realistic city layout next to impossible. Police, Fire and EMS responses do not properly route, traffic does not work properly and all the AI people seem to race to the nearest job site, thus making your Sim City have the highest employment turnover rates ever!

The game is nearly crippled due to the AI path finding, add on the server issues and always online and well actually enjoying yourself playing this game is next to impossible. 

Back to dosbox and Sim Town...