1%er - The Outlaw Motorcycle Game
Creepy Doll Studios: Generic 1 (2013 PDF)

10 Bad LARPs: Director's Cut
Alleged Entertainment: Generic / One-Off System 1 (2009 )

10 Faction Flags
Chaotic Shiny Productions: Generic 1 (2010 PDF)

10 Fantasy Coins
Chaotic Shiny Productions: Generic 1 (2010 PDF)

10 Gangs
Catalyst Game Labs: Shadowrun 4 (2010 PDF)

10 Jackpointers
Catalyst Game Labs: Shadowrun 4 (2010 PDF)

10 Million Ways to Die
I.C.E.: Generic (1999 )

10 New Feats
Valeur RPG: Dungeons & Dragons 5 (2016 PDF)
Dungeon Masters Guild: Dungeons & Dragons 5 (2016 PDF)

10 Region Maps
Chaotic Shiny Productions: Generic 1 (2010 PDF)

100 Bushels of Rye
Columbia Games: HârnMaster 1 (1988 )

100 Calamitous Curses
Adventure Games Publishing: Castles & Crusades 1 (2009 PDF)

100 Conspiracy Theories
Postmortem Studios: Generic 1 (2009 PDF)
Postmortem Studios: Generic 1 (2010 )

100 Conspirators
Postmortem Studios: Generic 1 (2010 )

100 Dark Places
Postmortem Studios: Generic 1 (2008 PDF)
Postmortem Studios: Generic 1 (2010 )

100 Encounters & Treasures: Level 1
Adventure Games Publishing: Castles & Crusades 1 (2009 Digest)

100 Exciting Encounters: 1st Level Encounters
Adventure Games Publishing: Castles & Crusades 1 (2009 PDF)

100 Fantasy Adventure Seeds
Postmortem Studios: Generic 1 (2004 PDF)
Postmortem Studios: Generic 1 (2010 )

100 Horror Adventure Seeds
Postmortem Studios: Generic 1 (2004 PDF)
Cubicle 7 Entertainment: Generic 1 (2010 )
Postmortem Studios: Generic 1 (2010 )

100 Fantasy Kingdoms
Postmortem Studios: Generic 1 (2006 PDF)
Postmortem Studios: Generic 1 (2010 )

100 Monster Bestiary
6d6, UK: 6d6 2 (2015 )

100 More Calamitous Curses
Adventure Games Publishing: Castles & Crusades 1 (2009 PDF)

100 Planets
Postmortem Studios: Generic 1 (2008 PDF)
Postmortem Studios: Generic 1 (2010 )

100 Science Fiction Adventure Seeds
Postmortem Studios: Generic 1 (2006 PDF)
Cubicle 7 Entertainment: Generic 1 (2009 )
Postmortem Studios: Generic 1 (2009 )

100 Spaceship Traits
Second Rat Games: Generic 1 (2009 PDF)

100 Street Vendors of the City State
Adventure Games Publishing: Castles & Crusades 1 (2010 PDF)

100 Treasure Troves: Treasure Type 1
Adventure Games Publishing: Castles & Crusades 1 (2009 PDF)

100% Fantasy Role-Playing Game System
Self-published: 100% Fantasy 1 (2009 PDF)

The 1000 Hells
White Wolf Publishing: Vampire: The Masquerade 2 (1999 )

101 1st Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 2nd Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 3rd Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 4th Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 5th Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 6th Level Spells
Rite Publishing: Pathfinder 1 (2010 PDF)

101 7th Level Spells
Rite Publishing: Pathfinder 1 (2011 PDF)

101 8th Level Spells
Rite Publishing: Pathfinder 1 (2011 PDF)

101 9th Level Spells
Rite Publishing: Pathfinder 1 (2011 PDF)

101 Arcane Spell Components
Ronin Arts: d20 3 (2003 PDF)

101 Cargos
BITS, UK: Generic 1 (1996 )
BITS, UK: Generic 1 (1997 )

101 City & Place Names
Polgarus Games: Generic 1 (2010 PDF)

101 Corporations
BITS, UK: Generic 1 (2001 )

101 Fantasy Riddles
Stainless Steel Dragon: Generic 1 (2009 PDF)

101 Fantasy Style Riddles II
Stainless Steel Dragon: Generic 1 (2010 PDF)

101 Governments
BITS, UK: Generic 1 (1998 Digest)

101 Lifeforms
BITS, UK: Generic 1 (1996 )

101 Magical Weapon Properties
Rite Publishing: Pathfinder 1 (2010 )

101 Malevolent Magic Items
Rite Publishing: Pathfinder 1 (2010 PDF)

101 Mundane Treasures
Ronin Arts: d20 3 (2002 PDF)

101 Patrons
BITS, UK: Generic 1 (2000 )

101 Plots
BITS, UK: Generic 1 (1996 )

101 Religions
BITS, UK: Generic 1 (1998 )

101 Rendezvous
BITS, UK: Generic 1 (1997 )

101 Robots
Digest Group Publications: Traveller 1 (1986 )

101 Rooms & Locations
Ennead Games: Generic 1 (2010 PDF)

101 Spellbooks
Ronin Arts: d20 3 (2002 PDF)
Ronin Arts: d20 3 (2003 PDF)

101 Starcrews
BITS, UK: Generic 1 (2005 )

101 Starship Names
Polgarus Games: Generic 1 (2010 PDF)

101 Travellers
BITS, UK: Generic 1 (1997 )

101 Vehicles
Digest Group Publications: MegaTraveller 1 (1988 )

10th Anniversary Dungeons & Dragons Collector's Set
TSR: D&D / Basic 2 (1984 Box)

The 11th Hour
Tricky Owlbear Publishing: d20 3.5 (2005 PDF)
Ronin Arts: d20 3.5 (2005 PDF)

11th Level Witch Doctor: Ratha Twice-Slain
Highmoon Games: Dungeons & Dragons 4 (2009 PDF)
One Bad Egg: Dungeons & Dragons 4 (2009 PDF)

1248 Sourcebook 1: Out of the Darkness
Comstar Media: Generic (2006 )
Avenger Enterprises: Generic (2006 )

1248 Sourcebook 2: Bearers of the Flame
Comstar Media: Generic (2006 )
Avenger Enterprises: Generic (2006 )

1248 Sourcebook 3: The Spinward States
Comstar Media: Generic (2008 PDF)
Avenger Enterprises: Generic (2008 PDF)

1248 Sourcebook 4: The Freedom League
Comstar Media: Generic 1 (2008 PDF)
Avenger Enterprises: Generic 1 (2008 PDF)

1248 Starships 1: Small Merchant Ships
Comstar Media: Traveller 1 (2006 PDF)
Avenger Enterprises: Traveller 1 (2006 PDF)

1248 Starships 2: Scout Ships
Comstar Media: Traveller 1 (2007 PDF)
Avenger Enterprises: Traveller 1 (2007 PDF)

13
The Impossible Dream: Dread 1 (2005 PDF)

13 Shades of Darkness
Plain Brown Wrapper Games: Mutants & Masterminds 1 (2005 PDF)
Plain Brown Wrapper Games: Mutants & Masterminds 2 (2006 PDF)

13 True Ways
Pelgrane Press: 13th Age 1 (2014 Hardcover)

1366
Graham Rose, UK: 1366 (2013 PDF)

13th Age
Pelgrane Press: 13th Age 1 (2013 Hardcover)

13th Age Bestiary
Pelgrane Press: 13th Age 1 (2014 Hardcover)

13th Age Glorantha
Chaosium: 13th Age 1 (2018 )
Rob Heinsoo Games: 13th Age 1 (2018 )

The 13th Skull
Goodman Games: Dungeon Crawl Classics 1 (2012 )
Goodman Games: Dungeon Crawl Classics 1 (2012 )

The 13th Warrior
Pinnacle: Savage Worlds 2 (2016 PDF)

The 13th Year
Farsight Games: Sketch System 1 (2009 PDF)

140 Henchmen for Hire
Self-published: Swords & Wizardry 1 (2008 PDF)

17 Archer Feats
The Le Games: d20 3.5 (2007 PDF)

17 Bard Spells
The Le Games: d20 3.5 (2006 PDF)

17 Magic Cloaks
The Le Games: d20 3.5 (2005 PDF)

17 Magic Shields
The Le Games: d20 3.5 (2006 PDF)

17 Monk Feats
The Le Games: d20 3.5 (2006 PDF)

17 New Conditions
EN Publishing: Dungeons & Dragons 4 (2010 PDF)

17 Plants
The Le Games: d20 3.5 (2006 PDF)

17 Rogue Feats
The Le Games: d20 3.5 (2006 PDF)

1879 Gamemaster's Guide
FASA Games Inc: Earthdawn 1 (2017 Digest)

1879 Players Guide
FASA Games Inc: Earthdawn 1 (2015 Digest)

The 1880 Smith and Robards Catalog
Pinnacle: Savage Worlds 2 (2011 )

The 1920s Investigator's Companion
Chaosium: Call of Cthulhu 5.5 (1997 )

1920s Investigators' Companion
Chaosium: Call of Cthulhu 5 (1993 )

1920s Investigators' Companion Volume II
Chaosium: Call of Cthulhu 5 (1994 )

1957
BTRC: EABA 2 (2017 PDF)

The 1960s
AEG: Spycraft 1 (2003 )

The 1990's Handbook
Chaosium: Call of Cthulhu 5 (1995 )

1A: The Hamlet of Thumble
Mystic Eye Games: d20 3 (2003 )
Open World Press: d20 3 (2003 )

1B: The Village of Oester
Mystic Eye Games: d20 3.5 (2004 )
Open World Press: d20 3.5 (2004 )

1d6 Degrees of Separation
Dork Storm Press: Fiction (2003 )

1E Heroic Abilities
Mob United Media: OSRIC 1 (2006 PDF)

THE 1PG Companion
Deep7: 1PG 1 (2002 PDF)