Just a few hours ago, an absolutely massive list of unreleased Steam titles was just leaked on Valve’s Steam Registry. Thanks to intrepid diggers over at Steamdb.info, Internet denizens have begun compiling lists of unreleased games hidden away in the nether of Steam’s games database.

How were these games discovered? The link above explains that it involves a little scripting wizardry that lets you uncover hidden application “packages” in Steam’s registry. The script uses the same methodology that allows Steam users to permanently delete games from their games library (a feature that was added on the fourth of this month). There’s no brute force entry into Steam’s database required. All it involves is logging into your Steampowered page, choosing your transaction ID, taking your session cookie and adding it to a special link, then downloading the link and parsing it through a scripting program.

Among some of the more notable packages found in the leak are listed below, with their game identification numbers listed before their titles:

366560 = Half Life 3
69024 DARK SOULS III
74693 Rise of the Tomb Raider (Pre-Purchase)
64178 FINAL FANTASY X/X-2 HD Remaster
71869 FINAL FANTASY VI (the smartphone port of the classic game)
412830 = STEINS;GATE
413410 = Danganronpa: Trigger Happy Havoc
413420 = Danganronpa 2: Goodbye Despair

With reports of Guilty Gear Xrd -SIGN-, Little King’s Story, and Sonic Boom in the NeoGAF thread. The Half-Life 3 entry will no doubt stir the rumor mill pot for fans of Valve’s classic shooter series. The Final Fantasy ports, meanwhile, resonates with interviews with Square Enix conducted earlier last year, where the Japanese RPG titan stated that they are interested in bringing more of their classic titles to Steam after the success of Final Fantasy VII and the XIII series on Valve’s distribution platform.

Most of the games appear to be Wii, Vita, Nintendo DS, and early PlayStation ports, along with a retinue of visual novels and arcade games.

Some of the more interesting and unusual titles include mysterious placeholders like “349880 = King of Fighters advertising app,”along with “422800 = Nightshade” (possibly the PlayStation 2 Shinobi series title, known as Kunoichi in Japan) and some Neo Geo arcade classics:

366230 = BASEBALL STARS 2
366240 = GAROU: MARK OF THE WOLVES
366260 = METAL SLUG 2
366270 = SHOCK TROOPERS
366280 = TWINKLE STAR SPRITES

Some dev tools for Sega’s classic Genesis/Mega Drive console:

400670 = SEGA Mega Drive – Dev App
400690 = Sega Mega Drive Workshop Tool

Some kind of crossover between Square-Enix and Valve for DOTA 2:

395120 = Final Fantasy Type-0 HD Bundle for Dota 2

And a particularly bizarre entry:

75298 Bad Rats Show

One can only begin to wonder what a sequel to one of Steam’s most infamous games will be like.

Steam registry entries are by no means concrete proof for upcoming titles, but they are correct more often than not. At the same time, please note that past database entries have also proven to be placeholders for undetermined future projects, such as Halo 3. So while Half-Life 3 is far from being confirmed just from this leak, avid gamers will definitely be keeping their eyes out for updates on the now-mythical title.

If you wish to see if your favorite game is on the list, check out this NeoGAF thread, or view this ever-growing list (silly url title aside, the link is safe). Or you can search for titles yourself on Steamdb.info. The list with the silly url does not contain everything mentioned in the NeoGAF thread, so it would be optimal to check both at once.