I noticed a long time ago that the standalone game
Talisman: Origns -- which I mentioned in
a post two years ago -- had been overlooked or forgotten by Omega64 (or whomever, if anyone, was maintaining the spreadsheet at that time). Nothing has changed with it since then (it still costs $1 more -- at least in the U.S. -- than on Steam), so it should still be included, since price disparity seems to still be fine as a sole criterion for inclusion in the spreadsheet.
I also see that the recent-ish Adventurer Starter Pack DLC bundle for
Talisman: Digital Edition that's available on both stores has a higher price on GOG (unlike the older DLC Bundle -- called Season Pass on Steam -- which is priced the same both places, despite both GOG and Steam versions still having identical contents, including 6 of the 9 individual price-discrepant DLC). The price of the dynamic Adventurer Starter Pack bundle on Steam ($13.47) is set to 10% lower than the sum of the 3 individual DLC...and, interestingly, that same discount percentage was apparently applied to the $1-higher sum of the GOG prices of those expansions (which includes one of the "DRM-free tax" ones), for a GOG price of $14.37 (roughly 7% more expensive than on Steam).
On an unrelated note: while I was locating the Talisman games in the spreadsheet, I noticed that
Spec Ops: The Line is still in the main list, despite having been delisted earlier this year. It should be moved to the "Removed Games" list.