Install OpenRCT2 on Gentoo - Quickstart Guide
Accept ~amd64 (or equivalent for your arch) for the openrct2 package, add this to /etc/portage/package.accept_keywords/openrct2 (for example):
Alternatively, if you want the latest development build, use the live ebuild. The live ebuild will compile the latest dev version, and although they should work, it may not always compile (when upstream build has changed but the ebuild hasn't caught up yet).
And then install the package by running the following command.
sudo emerge --ask --verbose openrct2
Select your RCT2 game files location
When OpenRCT2 first launches, you will be prompted to select the directory where you installed RollerCoaster Tycoon 2. You can also set the RCT2 path from the command line should you wish - use the command below.
openrct2 set-rct2 /path/to/rct2-install
End of Quickstart Guide
This concludes the Quickstart Guide. It's time to play OpenRCT2. If you have any questions, don't hesitate to ask for help on the forums.