I know that several of the IP badges/achievements don't trigger if there is more than one sim in the household. I proved this for myself in two of my video series.
1. The Isla Paradiso Bunch with multiple sims in the household and they completed all of the requirements for the questionable badges and none were triggered.
2. I started a new video series 'Caroline and Friends' in which Caroline lived alone and completed all of the requirements for the same group of badges and all were triggered.
It seems when a sim in a household completes some of the requirements for these badges any random sim in the household is credited with whatever what just done. So it can be theoretically possible to get the badges with a multi sim household because it is theoretically possible for the same sim to be randomly credited with the progress, it is more likely that it will be different sims credited with the progress made by the one sim doing all the work. When only one sim is in the household, then only that sim will get all the credit for sure. Hence the badges do trigger for a single sim household.
Has anyone tried completing this Laser Rhythm-a-Con reward in a household with only one sim?
