$ sudo apt-get update
$ sudo apt-get install openttd-openmsx 

openttd-openmsx is installed in your system.

Make ensure the openttd-openmsx package were installed using the commands given below,

$ sudo dpkg-query -l | grep openttd-openmsx *

You will get with openttd-openmsx package name, version, architecture and description in a table

openttd-openmsx package basic information: