On April 1st, the OpenTTD project eventually released their 1.0.0 version:
In March 2004 OpenTTD 0.1 was released. Hardly a month later in April 2004 OpenTTD 0.2. And today, six years later… OpenTTD 1.0.0. It was a lot of work, hundreds of thousands of translations, tens of thousands of commits, thousands of graphics, hundreds of patches, [...]
I play OpenTTD. There are three versions available and I want to have all three; stable, testing and nightly. I downloaded and compiled the source code for all three with no problems. The issue is when I want to compile a new version. When I extract the tar.xz file into /usr/lib/games/openttd-trunk/ the old files aren't overwritten.