I was surprised to find out there wasn't a tiered achievement for buying from the Zombie Den like there is for the Millionaire Center.

A "Patron of the Undead" or "Zombie Supporter" or some title like that would be super cool~

There is one (called Zombie Den Regular), but it's retired for some reason and didn't have prizes attached

I think it was retired once it was no longer a big deal to visit Skitters' shop when the Baker's Kiss plot made him decide to let the living purchase there.

If something gets created as an Achievement like this, it should be new and have a different name, different prizes, and different tiers, because it took some doing to do the other one.

I see no harm in this, even starting from scratch. Might give people more incentive to buy from there if they don't already/