Since questions about Completionist Mode are frequently asked in the forum, I decided to create a short guide.

Completionist Mode is designed to work through all houses.

Here is a short explanation based on 103 - Dave



You will find all the necessary information on your computer in the truck.

























On the left screen, you'll find the data section at the bottom left.
Here you can see at a glance how many houses you've already completed.

























The middle screen offers a detailed overview of the houses under Locations

























If you click on the house, in this case 103 - Dave, you will see a more detailed overview of the house.
If you click on the house, in this case 103 - Dave, you'll see a more detailed overview of the house.
In the top row, you can see that we've stolen 0/51 items, 0/3 VIP items, and completed 0/2 jobs.
All of this must be done to complete the house.
However, 75% of the required amount of items is sufficient.


























To complete the jobs, we go to the job page and select the appropriate jobs for level 103. To do this, all jobs at level 1 must be completed to access level 2.

So if certain jobs aren't available, you should complete the jobs at the lower level to unlock the higher level.
























After a couple of entertaining nights, we've collected enough items and completed the job, so that both items and jobs are completed, as indicated by the green color. Only one VIP item is missing.
























After another nerve-wracking night, we finally got our hands on the last VIP item.
Now that all three tasks are complete, the long-awaited claim button appears on the right, which we immediately click, earning us a little money and EXP.

























The house has now been completed and counts towards our final victory
























In the house overview you can now see the 103 with a green tick, which symbolizes our successful completion





















I hope my little guide helped you to understand the mechanics behind the Completionist Mode and to master it successfully