The result from the input is:
$ apt show openxcom
Package: openxcom
Version: 1.0-2~xenial2
Priority: optional
Section: games
Maintainer: Krzysztof Knapik <knapsu@gmail.com>
Installed-Size: 7,773 kB
Depends: libc6 (>= 2.14), libgcc1 (>= 1:3.0), libgl1-mesa-glx | libgl1, libsdl-gfx1.2-5 (>= 2.0.25), libsdl-image1.2 (>= 1.2.10), libsdl-mixer1.2, libsdl1.2debian (>= 1.2.11), libstdc++6 (>= 5.2), libyaml-cpp0.5v5
Download-Size: 1,964 kB
APT-Manual-Installed: yes
APT-Sources: https://ppa.launchpad.net/knapsu/openxcom/ubuntu xenial/main amd64 Packages
Description: Open-source clone of UFO: Enemy Unknown
OpenXcom is an open-source clone of the popular UFO: Enemy Unknown (X-COM: UFO Defense in USA)
turn-based strategy game by MicroProse. It is written in C++ / SDL and licensed under the GPL.
OpenXcom requires game resources from the original game (DOS, Windows or Steam version).
I did a search for libsdl1.2debian in synaptic and it says that it is installed. I was kind of hoping it wasn't because it would be a nice simple problem. I'll take a look at libyaml also. I did attempt to install the nightly version, but no matter what I did it gave me an error saying "No Xcom Installation Detected", so I went back to the other version.