"Even then, the cigarettes still sell."
The tense is mixed.
Either "Even so" or "still sold" will fix it.
...
In Never's office, when looking at the dresser picture...
"It's a autographed picture of those guys from the iPod commercial."
Should be "an".
...
In the mine drill, linking the Control Panel...
"You lather up some saliva and... smother it all over the control panel? Do I really have to read every line of dialogue? I'm sure we can afford to cut some of this out of the game."
Should be "slather".
...
In the Break Room...
The "Refridgerator" object should be called "Refrigerator".
...
In the Lab, talking to the Bird...
"I beg your pardon for my less-than-adequate brother, sir. It would appear the distribution of our brain cells was not exactly homologous, if you know what I mean."
Wrong word, "commensurate", maybe?
If yer gonna make it polly-syllabic to sound smart, use the right verbiage. Heh.
...
In the mental living room, looking at Slash...
After swapping toys, the description still says he's playing with a wagon.
...
In the mental monolith Break Room...
No 'Hamster in the Microwave' comment? For shame.

Day of the Tentacle was by Lucas Arts, so I guess it's excusable.
...
In the head room, looking at the melty photo on the right...
Wow, I didn't realize how similar the Kerona acid shower was to the Ortega lava bath.
I was soo ready to call "Hey that's SQ3!" until I checked both games.
No problem there.
