Keep Android Open is a grassroots campaign originally launched in October 2025 by Marc Prud’hommeaux as a response to Google’s Android developer verification announcement last year, which requires all Android developers to pay a fee and verify their identity with Google even if they do not distribute apps through the Google Play Store. I have previously written on my blog about the Google Play developer policy update that Google originally announced in July of 2023, and how my Google Play developer account was suspended in February last year as a result of my refusal to comply. So when Google announced this new policy change for distributing outside of Google Play too, I was rather furious by the fact that Google is further exercising control over the Android ecosystem. Safe to say, I wholly supported the Keep Android Open campaign when it was originally launched, and got very intrigued to throw my hat into the ring as the Principia project maintainer.

Hello, Principia 2026.09.19 has been released. This is a minor update that brings a bunch of bugfixes, as well as introduces a couple of dialogs implemented using Imgui on Android. As usual, you can ...

In this level you take the control of two different robots who you can switch between. Many obstacles await in the cave and cooperation between the two robots is necessary to get through the cave a...

It has been 4 years since Principia was released as open source back in August of 2022, freeing the game from its previous fate as proprietary abandonware. Since then, a lot has happened and Princi...