Links from what I've found on the DriveThru RPG site so far, more than last year, and all amazing freebies, given their actual prices!
1) Homepage, below the "Free Stuff" link =>
100 Things to Find at Halloween, full price $0.99, currently reduced to $0.74. Pretty much what it says!
2) The "My Library" page, lowest right =>
Xas Irkalla, normal price $15, reduced to $11.25 in the Halloween Sale otherwise. An adult, hard, very deadly RPG using the Strain survival-horror system. This is a core book, and ALL rules needed to play the game are included. Not for the faint-hearted, however.
3) The Hallowe'en Sale homepage, right-hand side, above the "Sort by" option label =>
Camp Pleasant, selling currently at $4.72, reduced from $6.29 in the Sale. A complete co-op storytelling game for 4-16 players, one last campfire session at the end of the season. With murder.
4) The "My Wishlist" page, at the lower right =>
The Basic Witch: The Pumpkin Spice Witch Tradition, retailing presently at $2.24 in PDF, down from $2.99 full price, a detailed look at witches for OSR RPGs, including D&D, Labyrinth Lord, etc. - spells (122 of them!), magic items, NPCs and all about the coven.
5) The "Our Latest Newsletter" page, left-hand side, just below the Astral VTT link =>
Knife to Know You, worth $3.71 currently, reduced from $4.95. An introductory OSR scenario for the Summerhaven teen-horror-pulp setting, short and low-level.
6) The "About Us" page, towards the lower left =>
Dial M for Monster (ScreenPlay), priced at $5, but reduced to $3.75 in the Halloween Sale. Monster in the museum 1950s style horror-mystery scenario with full unique game-system rules.
7) The Product Reviews page, top right =>
A Night in Seyvoth Manor (DnD 5E), now at $5.99 in PDF, down from $7.99 for the Sale. Night in Seyvoth has been around for some time, but this is the 5e update, a detailed horror scenario intended for a group of 6th level characters, and again, not for the faint-hearted!
8) The Genre - Horror menu option, top right of that page =>
Stranger Stuff (TinyD6) worth $7.46 at present, reduced from $9.95. This is a complete, rules-light RPG using the TinyD6 system, 1980s style adventure/horror/sci-fi, with teens as the PC protagonists.
9) The Products Awaiting Review page, top right =>
DarkPlaces (English), worth $11.21 at present, or $14.95 when it reverts to its non-Sale price (PDF). A complete horror RPG, needing no GM, just players.
10) Top right of the "Change my addresses" page =>
The (Un)Life of A Vampire Lady's Minions, a one-page-style OSR or 5e D&D scenario for 3-5 undead player creatures. The PDF is currently $0.71 in the Halloween Sale, reduced from $0.95.
11) Contact Options page ("Select how I wish to be contacted by publishers" account page link), right side above the list of publishers =>
Eldritch Century - Monsters STL bundle, which as the name suggests, is a set of STL files for 3D printing (resin optimised), worth $25. You will obviously need access to a suitable 3D printer, and be warned, as the file is a 495 MB RAR one, liable to take a while to download from OBS, and you may need something to unzip RAR files to access it.
12) Newsletters and Follow Your Favorites page, right side, just above the "Follow Your Favorites" section =>
Star Trek Adventures: Tribble Player Character (FREE), a freebie already, for Modiphius' Star Trek Adventures RPG. If only Shep were still with us...