Artbitrator

Artbitrator is a free browser drawing game in which you sketch a prompt and an AI tries to guess it, commenting aloud as you draw. You can play solo or with up to 12 friends on a phone, tablet or computer, which makes it a light party game or classroom activity.

Prompts range from simple objects to odd scenes like a ghost haunting the wrong house, and the race is to get the AI to name your drawing first. Finished drawings replay stroke by stroke and can be browsed in a public gallery.

There is nothing to download, and you can play as a guest or sign up with Google. The site lists several game modes and other activities, and a demo round shows how the AI comments while it works out the drawing.