I downloaded UltraViolet Dawn lite from the Mac App Store and was playing in it until the app prompted me to buy the full version. I had the game on my iPhone already and had no intention of buying the desktop version in the near future so I proceeded to quit the app.
Uninstalling it was trickier. I owned a copy of AppZapper but using it would be too easy so I assumed that Apple would give users the option of uninstalling their apps in the App Store app.
mac app store purchased items list
Turned out there wasn’t; which is an inconvenience to those who don’t have AppZapper. A bundled uninstall tool would be useful tool for Windows users switching over to the Mac. Perhaps apple will include something of the sort in the future.