Deus Ex is now free over at Gametap
Enter a world where the future is always uncertain...a world where the key to survival is held by a chosen few, and where terrorism is fueled by intense desperation. As operative JC Denton, you have a difficult decision to make: do you complete your mission and ensure the safety of the rich and powerful, or do you rebel for the sake of the millions who would be doomed without you?
Some other great first-person shooter games that are free are:
