Nope, there's a different offer each day afaik.
Vice City, IV and Bully all have been on sale with 75% off for 3 hours so far afaik.
EDIT: http://steamcommunity.com/groups/rockstargames_group
Joining that group will notify you of every sale this week. The sales so far were: Manhunt, IV, Max Payne, III, Bully, Episodes (only 25% off, though) and the Grand Theft Auto Classics Pack.
Vice City, IV and Bully all have been on sale with 75% off for 3 hours so far afaik.
EDIT: http://steamcommunity.com/groups/rockstargames_group
Joining that group will notify you of every sale this week. The sales so far were: Manhunt, IV, Max Payne, III, Bully, Episodes (only 25% off, though) and the Grand Theft Auto Classics Pack.