Some useful info I thought I could share with the community:
At:
https://knapsu.eu/openxcom/ you may some packages of the game, 0.9 version but for i386 and x86_64 architectures. The following packages are there:
openxcom_0.9~20130606-1_i386.deb
openxcom_0.9~20130606-1_amd64.deb
openxcom_0.9-1_i386.deb
openxcom_0.9-1_amd64.deb
Also there's a PPA avaiable at launchpad, maintained by Krzysztof Knapik, the URL is:
https://launchpad.net/~knapsu/+archive/openxcomAdd to /ect/apt/sources.list the following repositories:
deb https://ppa.launchpad.net/knapsu/openxcom/ubuntu YOUR_UBUNTU_VERSION_HERE main
deb-src https://ppa.launchpad.net/knapsu/openxcom/ubuntu YOUR_UBUNTU_VERSION_HERE main
For Oneiric ocelot (11.10) up to Thrusty (14.04) but still 0.9, so it won' provide the more recent game features, such as mod support, unless that ppa will be updated with version 1.0, cheers!