games-arcade/rocksndiamonds/rocksndiamonds-3.1.0.ebuild does not contain the contribution-levels, because they come no longer with the game itself but are shipped as seperate package. I'd recommend to add them Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 57421 [details, diff] patch for adding the contributions
In CVS. Thanks for the bug report and patch.