Most of the games on the first two pages should be DOS games, with perhaps a few found on page three. The original versions of The Repossessor, The Postman Only Dies Once, Paranormal Investigation, Monty on the Norm can be downloaded from their respective pages (view game details). Blastoff & I Spy comes with dos & windows versions in the download.
While you can use Mobygames as a resource, I wouldn't take the info there as 100% accurate. AGS 2.31 was the final version to have a dos-based editor, so earlier games stand a better chance of being dos only. Such as:
Lunchtime Of The Damned (AGS 2.14)
Vengeance of the Chicken (AGS 2.14)
RON 2 and 1/2: Fowl Play (AGS 2.15)
Nihilism (AGS 2.15)
Return of Die Vie Ess (AGS 2.20)
Davy Jones C'est Mort (AGS 2.15)
The Lost Treasure of RON (AGS 2.21)
I Spy 2 (AGS 2.56)
Hooky McPegleg, Pirate Postman (AGS 2.21)
Davy Jones is Back (AGS 2.30)
The Chef (AGS 2.31)