| Advanced European Theatre of Operations | 2002 | Douglas Niles | Decision Games | War | | BoardGameGeek-INFO (EN), BoardGameGeek-INFO (EN), EFUN-ORDER (EN), EZ (EN) | 10.01.07 | | |
| Agents & Operatives | 2016 | Christopher Batarlis | Everything Epic Games | Board | | | 16.05.16 | | |
| Alzo Zero: Operation Overlord | 2004 | Massimo Torriani | Italeri | War | Alzo Zero | | 29.01.08 | 70 | |
| Asterix & Obelix: Das kooperative Kartenspiel | 2016 | Michael Palm
Lukas Zach | Pegasus Spiele | Board | | | 22.10.17 | | Cancelled |
| AT 43: Operation Damocles | 2006 | Jérôme Rigal | Rackham / Universal Cards | War | | | 12.06.07 | | In print |
| Battlelines - Operation Uranus | 2003 | Jeff Billings | Lost Battalion Games | War | Battlelines | BoardGameGeek-INFO (EN) | 10.01.07 | US$ 30.00 | |
| Breaking into Valhalla: Operations Veritable and Grenade | 2001 | Paul Rohrbaugh | Microgame Design Group
Schutze Games | War | | BoardGameGeek-INFO (EN), EZ (EN) | 10.01.07 | | |
| Combat Operations | | | Bone Games | War | | EZ (EN) | 08.01.07 | | |
| Counter Space: The CGME Space Opera Gameworld | 2002 | Stephan Beal | Countermoves | War | | BoardGameGeek-INFO (EN) | 10.01.07 | | |
| Czas Honoru: Operacja Most III | 2013 | Micha Ozon | Phalanx | Board | | | 24.12.14 | | |
| Das Perry Rhodan Spiel: Operation Wega | 1986 | Reiner Müller | ASS | War | | BoardGameGeek-INFO (EN) | 16.08.07 | | |
| Days of Honour - Operation Wildhorn III | 2013 | | | Board | | | 27.02.18 | | |
| Defiant Russia: Operation Barbarossa, 1941 | 2004 | William Sariego | Avalanche Press | War | | BoardGameGeek-INFO (EN) | 09.01.07 | | |
| Doomtrooper: Apocalypse | | | Target Games AB | Board | Doomtrooper | | 09.01.07 | | |
| European Theatre of Operations | | | TSR | War | | EZ (EN), Homepage (EN), Homepage (EN), Homepage (EN) | 10.01.07 | | |
| Galaxy Defenders: Operation Strikeback | 2014 | Simone Romano | Ares | Board | | | 24.02.15 | | |
| Games Kit: 4 Co-operative Pencil & Paper Games | 1998 | Jim Deacove | Family Pastimes | Board | | EFUN-ORDER (EN) | 09.01.07 | US$ 3.95 | |
| Gauntlet: Operation Pedestal, August 11-13, 1942 | 2014 | Paul Rohrbaugh | High Flying Dice Games | Board | | | 23.12.14 | | |
| Le Fantome de l'Opera | 2013 | Bruno Cathala
Ludovic Maublanc | Hurrican | Board | | Brettspielbox (DE), DCLIQ (DE), H@LL9000 (DE), Heimspiele (DE), HunterUndCron (DE), ImmerSpielen (DE), spielfreude (DE) | 06.05.16 | | |
| Memoir 44: Operation Overlord | 2008 | Richard Borg | Days of Wonder | Board | | | 13.11.08 | EUR 20.00 | |
| Midnight Legion: Operation Deep Sleep | 2016 | C. Aaron Kreader | Studio 9 Games | Board | | | 16.05.16 | | |
| Opera | 2009 | Hans van Tol | Huch! | Board | | BrettspieleReport (DE), DasSpielen (DE), DBAR (DE), DCLIQ (DE), DHK (DE), Gamepack (NL), Gamepack (EN), H@LL9000 (DE), ReichDerSpiele (DE), SpieLama (DE), SpieleAkademie (DE), SpieleCheck (DE), Spieletest (DE), Spielphase (DE) | 20.08.10 | EUR 37.00 | |
| Operasjon | 1978 | | MB | Board | | | 09.01.07 | | |
| Operation | 1977 | | MB | Board | | EFUN-ORDER (EN), Spielphase (DE) | 09.01.07 | | |
| Operation Apocalypse | | | Histoire & Collections
Vae Victis | War | Vae Victis | EZ (EN) | 10.01.07 | | |
| Operation Badr | 1983 | David Moore | West End Games | War | | EZ (EN) | 10.01.07 | | |
| Operation Cannibal | | | Avalanche Press | War | Decisive Battles of World War II | EZ (EN) | 10.01.07 | US$ 29.95 | |
| Operation Condor | 1978 | Ken Broadhurst | World Wide Wargames | War | The Wargamer | BoardGameGeek-INFO (EN), EZ (EN) | 10.01.07 | | |
| Operation Conrad | | | Close Simulations | War | | EZ (EN) | 09.01.07 | | |
| Operation Crusader | 1978 | Frank Chadwick | GDW | War | | BoardGameGeek-INFO (EN), EZ (EN) | 10.01.07 | | |
| Operation Dragon Rouge | 1995 | Randy Moorehead | Simulations Workshop | War | | EZ (EN) | 10.01.07 | | |
| Operation F.A.U.S.T. | 2015 | Robert Burke | Robert Burke Games | Board | | | 18.10.15 | | |
| Operation Felix | | | Decision Games
Strategy and Tactics | War | S&T | EZ (EN) | 10.01.07 | | |
| Operation Grenade | | | SPI
Strategy and Tactics | War | S&T | | 11.01.07 | | |
| Operation Husky | 1979 | | Swedish Game Production
Combat | War | Combat Magazine | EZ (EN) | 09.01.07 | | |
| Operation Just Cause | | | Crunchy Frog Enterprises | Board | | | 09.01.07 | | |
| Operation Konrad | | Perry A. Moore | | War | | EZ (EN) | 10.01.07 | | |
| Operation Market Garden | | Knight | GDW | War | Double Blind | EZ (EN), EZ (EN) | 10.01.07 | | |
| Operation Matador | 1981 | David Shewchuk | Gryphon Graphics | War | | EZ (EN) | 08.01.07 | | |
| Operation Mercury | | | GMT Games | War | | EFUN-ORDER (EN), EZ (EN) | 10.01.07 | | |
| Operation Olympic | 1974 | | SPI
Strategy and Tactics | War | S&T | EZ (EN) | 09.01.07 | | |
| Operation Olympic | 1974 | | SPI | War | | EFUN-ORDER (EN) | 09.01.07 | | |
| Operation Pegasus | | | Task Force Games | War | | EZ (EN) | 10.01.07 | | |
| Operation Sea Lion | | | XTR Corp
Command | War | Command | EZ (EN) | 10.01.07 | | |
| Operation Shock Troop | | | Decision Games
Strategy and Tactics | War | S&T | EZ (EN) | 11.01.07 | | |
| Operation Shoestring | | | GMT Games | War | | EZ (EN) | 09.01.07 | | |
| Operation Solace | | | XTR Corp
Command | War | Command | EZ (EN) | 10.01.07 | | |
| Operation Spark | | | Clash of Arms Games | War | | EZ (EN) | 10.01.07 | | |
| Operation Typhoon | 1978 | | SPI | War | | EZ (EN) | 10.01.07 | | |
| Operation Veritable | 2000 | Paul Rohrbaugh | | War | | EZ (EN) | 10.01.07 | | |
| Operation Vital Ground | 1999 | Perry A. Moore | | War | | EZ (EN) | 10.01.07 | US$ 10 | |
| Operation Watchtower | | | Multi Man Publishing | War | | EZ (EN), EZ (EN) | 09.01.07 | | |
| Operation World War II | 2009 | Massimo Torriani | Nexus Editrice | Board | | | 13.05.09 | EUR 50.00 | |
| Operation: Kindergarten | 2015 | Harry-Pekka Kuusela | LudiCreations | Board | | | 18.10.15 | | |
| Operational Matters: An OCS Guide | 2016 | Dean Essig | Multi Man Publishing | Board | | | 16.05.16 | | |
| Operators | 2018 | Csepi Balázs | Cogitate Games | Board | | | 07.02.21 | | |
| Pacific Theatre of Operations | | | TSR | War | | EZ (EN) | 06.01.07 | | |
| Salerno: Operation Avalanche | 1978 | Albert A. Nofi | West End Games | War | | | 10.01.07 | | |
| Sator Arepo Tenet Opera Rotas | 2008 | Enrico Pesce
Federica Rinaldi | Heidelberger Spieleverlag
Post Scriptum
Scribabs | Board | | BoardgameMonkeys (DE), DCLIQ (DE), H@LL9000 (DE), RPGForen (DE), Spielepizza-INFO (DE,IT), Spieletest (DE) | 19.12.23 | EUR 30.00 | In print |
| Sator Arepo Tenet Opera Rotas: Malleus Maleficarum | 2015 | Enrico Pesce
Federica Rinaldi | Post Scriptum | Board | | | 18.10.15 | | |
| Space Opera | 2017 | David Martínez Díaz
Benet Domínguez
Anna Esplandiu
Marc Vinyes | Games 4 Gamers | Board | | | 06.02.21 | | |
| Tannhäuser: Operation Novgorod | 2008 | William Grosselin
Didier Poli | Heidelberger Spieleverlag | Board | | | 27.08.09 | EUR 40.00 | |
| The Dresden Files Cooperative Card Game | 2016 | Eric B. Vogel | Evil Hat Productions | Board | | | 16.05.16 | | |
| Tour Operator | 2018 | Nestor Tyrovouzis | Keep Exploring Games | Board | | | 08.02.21 | | |
| Viticulture World: Cooperative Expansion | 2022 | Pierluca Zizzi Francesco Testini
Mihir Shah | Stonemaier Games | Board | | Brettspielpoesie (DE), BrettUndPad (DE), SpieleAkademie (DE) | 06.07.22 | | In print |
