commercial video games released as freeware | Freebie Games | Forums

Commercial video games released as freeware are games that, in their original license, were not considered freeware,
but were re-released at a later date with a freeware license, sometimes
as publicity for a forthcoming sequel or compilation release.

Some of the following games are not freely redistributable software,
as they have only been made available as a free download as freeware,
but may only be downloaded from certain websites and with the explicit
permission of the copyright owner. Consult the software license
agreement.

go here for the list:

http://en.wikipedia.org/wiki/List_of_commercial_video_games_released_as_freeware