In TranZit, have all doors opened without being set on fire

You have to open a total of 19 doors in TranZit. While doing this, you are not allowed to walk into the lava on the ground or get damaged by a burning zombie. Make sure to build the turbine in the starting room! The 3 required parts are scattered across the room and you can build the turbine at the workbench (which is also in the same room). The turbine is required to open several doors. Only use it if necessary because it will fall apart after some while. If that happens you need to return to the first bus stop and equip it again

Stay in the starting area in the beginning until you have 7,000+ points and leave one zombie alive at the end of the round. After that, go from bus stop to bus stop and open every door that costs points as well as the doors that require a power source. Make sure to keep 2 grenades with you. They are needed to blow open the bank vault at the last bus stop!

Bus Stop #1 - 3 Doors (1 x 750 points, 2 x turbine)
Bus Stop #2 - 3 Doors (2 x 750 points, 1 x turbine)
Bus Stop #3 - 4 Doors (2 x 750 points, 2 x turbine)
Bus Stop #4 - 3 Doors (1 x 750 points, 2 x turbine - 1st turbine door opens the pack-a-punch door in the town)
Bus Stop #5 - 6 Doors (1 x 1000 points, 2 x 750 points, 2 x grenade, 1 x turbine)

This can also be boosted in co-op. You can stay at a safe area and let your friends open all the doors for you. As long as you personally do not step on the lava it will still give you the trophy