LucasArts Entertainment (from 1982 to 1990: Lucasfilm Games) made
The Secret of Monkey Island, Monkey Island 2: LeChuck's Revenge, The Curse of Monkey Island, Grim Fandango, Indiana Jones & the Fate of Atlantis, Maniac Mansion, Maniac Mansion: Day of the Tentacle, Full Throttle, Sam & Max Hit the Road - i.e. 9 of the best pont&click adventure games ever made
(plus: Loom, Zack McKracken & the Alien Mindbenders, Indiana Jones & the Last Crusade, Escape from Monkey Island, which were no masterpieces but very good as well; even their imo only bad adventure game The Dig was somewhat enjoyable, I hear some people even loved it).
Other classics include the 1988-1992 flight sim trilogy Battlehawks 1942/Their Finest Hour/Secret Weapons of the Luftwaffe and the Star Wars games Rebel Assault (the famous 1993 killer app for CD-ROM drives), X-Wing, Tie Fighter, Dark Forces, Jedi Knight.
The last brilliant game initiated and published (but in this case not developed) by LucasArts was Star Wars: Knights of the Old Republic 10 years ago.
R.I.P., my most favourite game company of the 90s. Best adventure game developer ever. Thanks for all the SCUMM .