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You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.

X-Com : UFO Defense

You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.

- Command deadly close-combat battles

Shooting down UFOs is just the beginning: you must then lead a squad of heavily-armed soldiers across different terrains as they investigate the UFO crash site. Tackle the aliens with automatic rifles, rocket launchers, and even tanks in the struggle to retrieve useful technology, weapons or life forms.

- Research and manufacture alien technologies

Successful ground assault missions will allow X-COM scientists to analyze alien items. Each new breakthrough brings you a little closer to understanding the technology and culture of the alien races. Once you have sufficient research data on the UFO's superior weapons and crafts, you'll be able to manufacture weapons of equal capability.

- Develop a strategy to save the Earth

You must make every crucial decision as you combat the powerful alien forces. But you'll also need to watch the world political situation: governments may be forced into secret pacts with the aliens and then begin to reduce X-COM funding.

Minimum Requirements:

Supported OS:Microsoft® 2000/XP/Vista®
Processor:80386 processor or better
Memory:4Mb RAM
Sound Cards Supported:AdLib compatible cards, SoundBlaster compatible cards and the Roland LAPC-1.

Para ativar a chave Steam que você recebeu, siga as instruções abaixo:

1. Em primeiro lugar, abra o cliente Steam. (Se você não o tiver, simplesmente clique no botão "Instalar Steam" aqui => Loja Steam)
2. Faça login na sua conta Steam. (Se você não tiver uma, clique aqui para criar uma nova => Conta Steam)
3. Clique no botão "ADICIONAR UM JOGO" no canto inferior do cliente.
4. Em seguida, selecione "Ativar um produto no Steam..."
5. Escreva ou copie e cole a chave de ativação que você recebeu de Voidu na janela.
6. Seu jogo agora está visível na sua biblioteca! Clique na sua "Biblioteca".
7. E, finalmente, clique no jogo e selecione "Instalar" para iniciar o seu download.