This is classic – some of the greatest adventures ever made in “speedruns” – i. e. played through in the shortest time possible.
Maniac Mansion:
[youtube WiBx1ndz3GY]
Day of the Tentacle:
[youtube ABaqSKl80yg]
And – a really long one – King’s Quest 6 (first part – use YouTube links to get to parts 2-8):
[youtube zbKZ-1LGyss]
Doesn’t look as impressive as the Quake Done Quick series (amongst others), but still amazing that people go to such lengths!