This is the trial freeware version from http://www.download.com/Empire-XP/3641-7562_4-9021391.html.
License: Free to try. 9.50 to buy.
The full version probably works just as well.
wine c:\\windows\\installer\\instmsi0\\msiexec.exe /i z:\\path\\to\\EmpireXP42.msi
It should default to Program Files/empirexp42 despite a small bug.
Run "~/.wine/drive_c/Program Files/empirexp42/Empire.exe"
Currently there is an issue with alsa and the music it makes when somebody captures a continent. Either turn off alsa or try a different driver.