This highly addictive game will definatly be in your top 10 oldy's

User Rating: 9.2 | X-COM: UFO Defense PC
I personaly started playing this about 10 years ago, 2 years after it's release. I got more addicted every step of the game, it has a charm over it and and will leave a beutifull memory in your mind.

The alliens have infiltrated our plannet and want to take it over sounds realy "Cliché" but the story line is realy good. You start out with a base and some money and have to build it up, buy/sell weapons, hire/fire personel, do research and manufacture items. All those things cost money so you have to sell allien artifacts but most importantly help the nations of earth. Those nations are your sponsers and when you do a good job they will sponsor you with more money. But if you screw up and fail to help them they will submit to the alliens and will no longer give you money. So how do you make them happier? Your radar will detect allien UFO's, ones you detected one you have to shoot it down and investigate the crash site. There awaits a turn based combat scenario. Each action you give one of your soldiers will cost time units, these timeunits are refreshed after each round. This is a very tactical part of the game. And takes most of the time of the game. You'll have to capture live alliens to get further with the story. And research the artifacts you find. Later on the alliens will attack city's and boats then humans are involved save as many humans as you can and people will be very pleased by you. Eventually you'll have to attack there bases and win the game by defeating there main base.