If that were the purpose, we'd only be listing source ports and engine reimplementations.
If you take a moment and view the list, you'll notice it contains both DOSBox and ScummVM games, in addition to games that work under Wine - neither of these qualify under "run properly on Linux".
As an observation, neither of those will have source-code for a source port in most cases.
As an additional observation, anything running properly in ScummVM is
running properly under Linux.
Depends on the games, really. If you've got source code accessible, a source port is preferable. However, most people will contend that if the games run "properly" under DosBOX or similar on Windows, it also runs "properly" on OSX and Linux as well in the same vein. Your position is part of the problem, not the solution, so you should probably re-evaluate it.
(As an aside, I do source ports for Indie studios (One of the devs for the HIB #2, in fact...) so I kind of do know what I'm talking about here.)