TinyBuild has released a free version of its Silver Award-winning puzzler Divide By Sheep on Android.
The reason for doing this is to experiment with a different monetisation system.
But for this free version of Divide By Sheep the revenue comes from putting adverts in front of players.
"I've been seeing more and more successful - and fun - mobile games adopt ads-based monetization, and we've been really curious to try it," says tinyBuild's Alex Nichiporchik.
"I found myself not mind watching an ad if I fail at a game, and Divide By Sheep is our first experiment."
Does this mean that tinyBuild's games will be free and ad-supported in the future? It seems doubtful, but maybe the studio will offer alternative free versions of its games as it's doing with Divide By Sheep.
Then again, it's possible - perhaps it depends on how successful this experiment ends up being.
You can download the free version of Divide By Sheep on Google Play.