Operation Xenocide is for version 1.3. It has 2 levels and the file is 123KB in size. The file name is xenocide.zip. It was released on May 12, 1997.

Operation Xenocide has good level design and very good gameplay with a nice level of detail. There is enough health and ammo to make it through most areas if you are careful. Level 1 starts out on the planet surface where you are transported into a building with what looks like a conference room with a hunting lodge theme. From there you work your way down until you arrive at a temple area. On the way there are a few interesting obstacles to pass. One is a trick door that took me a little while to figure out. There are quite a few secret areas on this level. Try to find them because ammo and health are in short supply later. Then it's on the the secret base. Level 2 starts at the entrance of the base. If you get stuck a little way in go through the sleeping quarters again. Then you work your way through the base cleaning out the aliens. Again look for the secret areas, they help a lot. I rate this TC as very good with 4 out of 5 stars.