The key is for the Leisure Suit Larry - Retro Bundle, so activating it will get you these 7 other games as well:

Leisure Suit Larry 1 - In the Land of the Lounge Lizards
Leisure Suit Larry 2 - Looking For Love (In Several Wrong Places)
Leisure Suit Larry 3 - Passionate Patti in Pursuit of the Pulsating Pectorals
Leisure Suit Larry 5 - Passionate Patti Does a Little Undercover Work
Leisure Suit Larry 6 - Shape Up Or Slip Out
Leisure Suit Larry 7 - Love for Sail

Good luck! and activate before the 28th.