20 Co-op games like Diplomacy is Not an Option that you should try

Games like Diplomacy is Not an Option · Find similar →

Ranking compiled by Lluis Enric Mayans, Founder & Head of ContentUpdated May 19, 2026How this is calculatedOrdered by an attribute-similarity model, not editorial opinion.

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We filtered the 50 games similar to Diplomacy is Not an Option down to the 20 that fit the “Co-op” category. Craft The World, Castle Story and Bloons TD 6 top the list, ranked by affinity and similarity score to Diplomacy is Not an Option.

iRank80/ 100

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GenreStrategySubgenreTower Defense

The best co-op games like Diplomacy is Not an Option

20 similar games foundUpdated May 2026

Handpicked by our similarity algorithm, these are the titles with the highest gameplay match to Diplomacy is Not an Option. Each one has been evaluated across 19 real attributes — from combat style and progression mechanics to world structure and visual perspective — so every recommendation is based on how the game actually plays, not just its genre label.

#1Craft The WorldClosest overall match

iRank83

GenreStrategySubgenreTower Defense

SoloCo-opCasualHardcoreSandbox WorldMedievalBase BuildingManagement

Steam👍 88%· 17KRAWG👍 75%· 157

Year 2014Dev Dekovir EntertainmentPlaytime ~9hOn PC · Apple Macintosh

✓ Fits the tower defense games cluster, with deep simulation, sandbox freedom and adventure storytelling

≠ Its own twist: deep RPG systems, roguelike runs and open world exploration, while skipping real-time strategy

Craft The World is a unique sandbox strategy game, the mix of Dungeon Keeper, Terraria and Dwarf Fortress. Explore a random generated world populated by dangerous creatures, build a dwarf fortress, gather resources, and craft all the items, weapons, and armor you need.

Where it drifts furthest from Diplomacy is Not an Option: visuals and setting.

It predates Diplomacy is Not an Option by 10 years, with what that implies technically.

Genre100Tone80Game mode77Progression61World59Setting42

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Steam GOG

#2Castle StoryClosest on visuals

iRank63

GenreStrategySubgenreTower Defense

SoloCo-opSandbox WorldHistoricalMedievalBase BuildingIsometric

Steam👍 65%· 11KRAWG👍 59%· 27

Year 2012Dev Sauropod StudioPlaytime ~3hOn PC · iOS · Android

✓ Both are tower defense games — sharing deep simulation, sandbox freedom and real-time strategy

≠ Stands apart with open world exploration, combat magic and multiplayer gameplay, while skipping vibe casual

An epic adventure awaits you in Castle Story, a strategy game where you command friendly creatures called Bricktrons. Have them explore, carve, dig and gather resources from vast, spectacular floating islands, reshaping the voxel-based world to your desire!

Where it drifts furthest from Diplomacy is Not an Option: combat.

On reception: its Steam reviews are mixed, against very positive for Diplomacy is Not an Option.

It predates Diplomacy is Not an Option by 12 years, with what that implies technically.

Genre100Visuals100Setting83World83Game mode78Progression55

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Steam

#3Bloons TD 6Closest on world

iRank91

GenreStrategySubgenreTower Defense

SoloCo-opTacticalCasualHardcoreSandbox WorldManagementIsometric

Steam👍 97%· 386KRAWG👍 81%· 208

Year 2018Dev Ninja KiwiPlaytime ~8hOn PC · iOS · Android

✓ Fits the tower defense games cluster, with tower defense planning, sandbox freedom and survival mechanics

≠ Stands apart with cozy, relaxing feel, combat magic and ranged combat, while skipping deep simulation

The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available.

Genre100World100Tone73Visuals64Combat62Game mode59

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Steam Epic itch.io

#4Atom Zombie Smasher

iRank70

GenreStrategySubgenreTower Defense

SoloCo-opTacticalDarkCasualSandbox WorldHorrorIsometric

Steam👍 90%· 2.1KRAWG👍 36%· 101MC75

Year 2011Dev Blendo GamesPlaytime ~1hOn PC · Apple Macintosh · Linux

✓ Both are tower defense games — sharing tower defense planning, sandbox freedom and real-time strategy

≠ Where it differs: brings procedural generation, melee combat and post-apocalyptic world, while skipping deep simulation

The game is a real-time strategy from the independent studio Blendo Games. The main task is to save as many people as possible from the advancing horde of zombies.

Where it drifts furthest from Diplomacy is Not an Option: setting.

It predates Diplomacy is Not an Option by 13 years, with what that implies technically.

Genre100Combat78Tone73Game mode59World57Visuals51

GenreStrategySubgenreTower Defense

SoloCo-opTacticalCasualSandbox WorldIsometric

Steam👍 95%· 12K

Year 2011Dev Ninja KiwiOn PS4 · Android · PC

✓ Both are tower defense games — sharing tower defense planning, deep simulation and sandbox freedom

≠ Where it differs: brings melee combat, multiplayer gameplay and online features, while skipping real-time strategy

Where it drifts furthest from Diplomacy is Not an Option: tone.

It predates Diplomacy is Not an Option by 13 years, with what that implies technically.

Genre100World100Visuals88Combat85Game mode69Tone45

GenreStrategySubgenreTower Defense

Co-opSoloDarkSandbox WorldHorrorBase Building

Steam👍 87%· 399KRAWG👍 53%· 497IGDB36· 8OC39· 34

Year 2013Dev Telltale GamesPlaytime ~9hOn PC · PS · Xbox

✓ Both are tower defense games — sharing survival mechanics, deep simulation and adventure storytelling

≠ Stands apart with deep RPG systems, shooter and first-person shooting, while skipping real-time strategy

After the nuclear war, people have to survive, and 7 Days to Die gives players the opportunity to experience it. The large parts of the planet are ravaged by destruction, and lone survivors are under the constant threat, even within relatively safe counties, like Navezgane, Nevada.

Where it drifts furthest from Diplomacy is Not an Option: combat and visuals.

It predates Diplomacy is Not an Option by 11 years, with what that implies technically.

Genre100World51Game mode48Tone44Progression40Setting32

GenreStrategySubgenreTower Defense

SoloCo-opMedievalBase BuildingMultiplayer

Steam👍 90%· 38KOC78· 25

Year 2018Dev Noio · Raw FuryOn PS4 · Linux · Android

✓ Fits the tower defense games cluster, with tower defense planning, adventure storytelling and deep simulation

≠ Where it differs: brings deep RPG systems, strong narrative focus and fantasy world, while skipping real-time strategy

Where it drifts furthest from Diplomacy is Not an Option: tone and visuals.

Genre100Progression64Game mode51Setting47Tone0Visuals0

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Steam GOG Xbox

#8RobowarsClosest on game mode

iRank46

GenreStrategySubgenreTower Defense

SoloCo-opTacticalHistoricalIsometric

Steam👍 46%· 290

Year 2014Dev N-Game Studios · KissPlaytime ~3hOn PC

✓ Same family of tower defense games: tower defense planning, real-time strategy and combat tactical

≠ Where it differs: brings card game strategy, melee combat and setting scifi, while skipping deep simulation

In the near future, mankind has opened the way to the stars – made possible through the use of droids, able to operate in the hostile environment of the deep space. However, both spaceships and droids are dependent on ‘Neonium’ for their power.

Where it drifts furthest from Diplomacy is Not an Option: setting and visuals.

On reception: its Steam reviews are mixed, against very positive for Diplomacy is Not an Option.

It predates Diplomacy is Not an Option by 10 years, with what that implies technically.

Genre100Game mode100Combat78Visuals39Setting33

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Steam

#9Clash of Clans

GenreStrategySubgenreTower Defense

SoloCo-opIsometricMultiplayerFantasy

Year 2012Dev SupercellOn Android · iOS

✓ Same family of tower defense games: real-time strategy, tower defense planning and single-player focus

≠ Its own twist: fantasy world, multiplayer gameplay and free to play, while skipping deep simulation

Where it drifts furthest from Diplomacy is Not an Option: setting.

It predates Diplomacy is Not an Option by 12 years, with what that implies technically.

Genre100Visuals100Game mode79Setting0

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#10Plague Inc: EvolvedClosest on combat

iRank87

GenreStrategySubgenreRTS

SoloCo-opTacticalCasualDarkSandbox WorldHorrorIsometric

Steam👍 94%· 62KRAWG👍 86%· 667MC80IGDB80· 3

Year 2015Dev Ndemic CreationsPlaytime ~5hOn PC · PS · Xbox

✓ If you enjoyed Diplomacy is Not an Option, expect real-time strategy, deep simulation and survival mechanics

≠ Where it differs: brings post-apocalyptic world and multiplayer gameplay, while skipping adventure storytelling

Plague Inc: Evolved is a biological simulation/strategy game developed by Ndemic Creations. In Plague Inc: Evolved the player controls a disease, that infects patient zero in a selected country.

Where it drifts furthest from Diplomacy is Not an Option: setting.

It predates Diplomacy is Not an Option by 9 years, with what that implies technically.

Combat100World100Visuals100Game mode77Tone75Genre50

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Steam Xbox PS

#11AI War: Fleet Command

iRank69

GenreStrategySubgenreTower Defense

Co-opSoloTacticalHardcoreIsometric

Steam👍 82%· 1.6KRAWG👍 26%· 50MC80IGDB90· 1

Year 2009Dev Arcen GamesPlaytime ~3hOn PC · Apple Macintosh · Linux

✓ Same family of tower defense games: real-time strategy, deep simulation and tower defense planning

≠ Where it differs: brings turn-based strategy, open world exploration and melee combat, while skipping adventure storytelling

###Impulse A real-time strategy developed by independent developers from Arcen Games. The game first appeared on the public in 2009 on the developer's site and the Impulse site, and later appeared on Steam in version 2.0.

Where it drifts furthest from Diplomacy is Not an Option: world and setting.

It predates Diplomacy is Not an Option by 15 years, with what that implies technically.

Genre100Visuals100Combat86Game mode79Tone51Setting0

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Steam GOG

#12Rock of AgesClosest on setting

iRank79

GenreStrategySubgenreTower Defense

SoloCo-opCasualHistoricalMedievalBase BuildingIsometric

Steam👍 92%· 4.0KRAWG👍 66%· 209MC74IGDB75· 5

Year 2011Dev ACE Team · Atlus USAPlaytime ~2hOn PC · PS · Xbox

✓ Fits the tower defense games cluster, with tower defense planning, vibe casual and historical setting

≠ Stands apart with racing gameplay, melee combat and offline, while skipping deep simulation

Rock of Ages is a game which resembles a racing game, a Tower Defence and a platformer at the same time. It was developed by ACE Team. The game is loosely based on the myth of Sisyphus.

Where it drifts furthest from Diplomacy is Not an Option: combat and tone.

It predates Diplomacy is Not an Option by 13 years, with what that implies technically.

Genre100Setting84Visuals71Progression56Game mode49Tone39

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Steam Xbox PS

#13Europa Universalis IV

iRank86

GenreStrategySubgenreRTS

SoloCo-opTacticalSandbox WorldHistoricalMedievalManagementIsometric

Steam👍 88%· 136KRAWG👍 83%· 396MC87IGDB85· 2

Year 2013Dev Paradox Development Studio · Paradox InteractivePlaytime ~6hOn PC · Apple Macintosh · Linux

✓ If you enjoyed Diplomacy is Not an Option, expect real-time strategy, deep simulation and sandbox freedom

≠ Where it differs: brings turn-based strategy, open world exploration and fantasy world, while skipping adventure storytelling

Europa Universalis IV is a global strategy game developed by Paradox Interactive. It is the fifth game in the series, not counting the add-ons. ###Gameplay The game can take place at any time starting from the late Middle Age to the Napolean Wars era.

It predates Diplomacy is Not an Option by 11 years, with what that implies technically.

Combat100Visuals100Game mode78Setting77World70Progression68

GenreStrategySubgenreRTS

SoloCo-opTacticalSandbox WorldHistoricalMedievalBase BuildingManagementIsometric

Steam👍 33%· 4.8KRAWG👍 28%· 50IGDB52· 3

Year 2012Dev FireFly StudiosPlaytime ~4hOn PC · Apple Macintosh · Linux

✓ If you enjoyed Diplomacy is Not an Option, expect real-time strategy, deep simulation and sandbox freedom

≠ Where it differs: brings open world exploration, ranged combat and fantasy world, while skipping adventure storytelling

Stronghold 3: Gold is the long-awaited third installment in the award winning castle-building series. Set 10 years after the original, the Wolf it seems, has cheated death and during his painful recovery he’s become even more bitter and twisted. Now he seeks revenge.

On reception: its Steam reviews are mostly negative, against very positive for Diplomacy is Not an Option.

It predates Diplomacy is Not an Option by 12 years, with what that implies technically.

Visuals100Progression96World84Combat78Setting77Game mode71

GenreStrategySubgenreTower Defense

SoloCo-opDarkHorrorMultiplayer

Steam👍 90%· 439MC75

Year 2010Dev Cadenza InteractivePlaytime ~5hOn PC

✓ Fits the tower defense games cluster, with tower defense planning, survival mechanics and dark, oppressive atmosphere

≠ Its own twist: roguelike runs, procedural generation and setting scifi, while skipping deep simulation

Jump in to intense turret defense action with Sol Survivor! Build turrets to defend your colony and the innocent colonists within. Smash enemies with volleys of actively-controlled orbital support.

Where it drifts furthest from Diplomacy is Not an Option: world and setting.

It predates Diplomacy is Not an Option by 14 years, with what that implies technically.

Genre100Game mode78Tone40Setting31World0

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Steam

Complete list of co-op games like Diplomacy is Not an Option

The full catalog of games sharing gameplay DNA with Diplomacy is Not an Option, ordered from highest to lowest similarity score. Use the filters above to narrow down by genre, setting or game mode and find the alternative that best fits your playstyle.