The free demo version of A.I.D. - Artificial Intelligence Defence is available on GOG.COM. You can download it here

A.I.D. Artificial Intelligence Defense is a tactical tower defense RTS with extremely dynamic gameplay.

The first stage of the plan was completed. It was the easiest one, though. Now it’s time to finish the job – find, explore and destroy the last remaining human dwellings, hidden and scattered around the world, giving refuge to people who are refusing to give up the fight and accept their inevitable fate.

Coordinate the operations of an advanced artificial intelligence program with only one
aim – to clear the Earth from the remains of humanity. Make use of technology and cold calculation against the partisan enemy forces that are ready to sacrifice everything in order to survive. You won’t allow them to do that, however. You can’t. You are their fate.

Lead the operations of an advanced artificial intelligence program with only one aim – to clear the Earth from the remains of humanity
Develop technology, extend your base, expand and increase your abilities to complete the task
Devise new solutions, improve and produce new combat units
Design and create a net of defences and fortifications which will assure the security of your central unit
Collect data, spy on your enemy, broaden your knowledge
Formulate the best strategies for combat and operations
Play alone or with friends

Expand your technology beyond your enemy’s understanding. Even though you were created from a human design, you are no longer limited. Nothing can stop you, except your computing power. Develop, extend and increase your abilities to complete the task.

Devise new solutions, work on improving and producing new combat units. Develop, adapt and face new challenges and conditions.

The threat is constant and can attack from all sides. You cannot take the liberty of having a weak point. Design and create a net of defences and fortifications which will assure the security of your central unit. Security, that will lead to a smooth and consistent execution of the plan.

The maximum amount of available information is knowledge, and knowledge is power. Spy on the enemy, acquire data and broaden your knowledge. Use it to formulate the best strategies for combat and operations to clear more territories and extend your control.

Fight till the end
You cannot give up. You are not capable of doing that. You have an objective to complete and you will complete it regardless of the hardships you have to face. Fight until the end. Fight for every bit of the Earth. Fight until you finish the purification process.

A.I.D. - Artificial Intelligence Defence screenshots