I've started playing the free online browser-based game 'Asterix and Friends'. My first impressions are in the above video.
The game is free to play, but with the option of paying for resources that make it easier. You start in a village ruined by Roman attacks and must gather wood, straw, and stone to put it back together.
As you rebuild your village, its inhabitants return. They look exactly like the villagers from the Asterix books, so the old man who appears is basically Geriatrix. He gives you quests that guide you towards goals.
I have some quibbles with it at the moment (as you'll see in the video) but it does have a lot of the charm of the original comics and I'm going to persevere with it.