My most favorite games :

Warcraft II
Red Alert Counterstrike
Warlords III

Screamer 2
Motor Racer

Quake
Duke Nukem 3D

Under a Killing Moon (interactive movie/ adventure)
The Pandora Directive (interactive movie/ adventure)

Day of the Tentacle (adventure)
Sam en Max Hit the Road (adventure)
Full Throttle (adventure)
Monkey Island 2 (adventure)