Crime Boss: Rockay City

Urban Legends is one of the multiplayer modes, but you can create solo lobbies and fill spots up with bots. In this mode, you play through 3 missions in a row. The requirements for 3 stars are also the same, complete the mission and bonus objective without losing any team members or killing any civilians. The rating for the whole Urban Legend seems to be based on the lowest rating for any individual mission in the chain, so you'll need to 3-star every mission in the Urban Legend. If you fail or surrender at any point, you have to start the whole Urban Legend from the beginning, but progress in an Urban Legend is saved after mission completion, so you can get around the failure state by just closing the game in the middle. Difficulty does not matter, and I highly recommend you play on the lowest just for the unlimited pings.

Most if not all of the missions are the same or very similar to missions you will play in the campaign including big story heists like Dragon Dogs and Import Export, so most of your strategies will work here with maybe one caveat - the multiplayer bots seems SIGNIFICANTLY dumber than the campaign bots. In my experience, they are way more prone to just run through enemy sightlines in stealth, have way fewer survival instincts than their campaign counterparts for some reason, are less likely to auto-collect loot, and have more broken pathing in general. I have no idea why and I could be wrong, I just had way more problems dealing with them than I ever did with the campaign bots. At a certain point, I basically pretended they weren't there until they started dying. One thing I did to help offset this was to play as the lowest health character of the team, as they are naturally the most likely to die first and I could keep them back or find cover for them better. I also focused entirely on combat during police assaults and either hoped the AI would pick up loot on their own or just waited for the breaks to start packing bags.

After that, the only mission that gave me trouble was the warehouse defense mission, which also seemed to last longer and have more melee enemies than its campaign counterpart for some reason. The melee guys are surprisingly fast and strong, so prioritize them first. Don't forget about your equipment, at least one of the characters on this mission has a frag. If the AI all seem particularly focused on one door, start watching another one. I didn't HMG turrets particularly useful here. And generally try to keep distance from the other AI bots so you all don't get hurt at once.