The base game is great and has a very interesting story. The modding community is amazing, with such classics as Carmaggedon and Tsunami mods

Just last week I was out at the countyside and I saw a combine harvester fade through 4 people and ramp off a small pebble, flying 30 feet. 11/10 IGN

C'mon it's free, there is no reason not to play this brilliant class based first person shooter.

Have you ever wondered what it's like to run an airline? No. Well neither have I but I am sure this is nothing like it. Nope not one litle bit.

You'll have a great time robbing banks, especially when you play it with friends,

XCOM: Enemy Unknown is simply put a fantastic turn based strategy game in which you take control of Earth's last defense force against the alien race.

You can recreate history in this fantastic strategy game. Not to mention the modding community is fantastic.

A fantastic game, played it a lot on the PS3 and I'm sure that it will be an even better experience on PC.