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Steam app 392470 · updated 12 Sep 2026, 22:20 UTC

NOBUNAGA'S AMBITION: Sphere of Influence

Become a Daimyo of the Warring States period of Japanese history in NOBUNAGA'S AMBITION, a historical simulation game of conquest and domination. It is the 30th anniversary of this series and this current release, NOBUNAGA'S AMBITION: Sphere of Influence, is the crown of the series.

NOBUNAGA'S AMBITION: Sphere of Influence Steam header artwork
KOEI TECMO GAMES CO., LTD.KOEI TECMO GAMES CO., LTD.
14playing now
1824-hour peak
1,160all-time peak
11average, last 30 days

The last 30 days

−1.4Gain−11.1%% gain26Peak

292 hourly samples, with the daily peak drawn over them. Weekends are shaded.

0714212814 Aug19 Aug24 Aug29 Aug03 Sep08 SepFriday 14 August 202614 peakSaturday 15 August 202617 peakSunday 16 August 202619 peakMonday 17 August 202612 peakTuesday 18 August 202614 peakWednesday 19 August 202618 peakThursday 20 August 202615 peakFriday 21 August 202613 peakSaturday 22 August 202617 peakSunday 23 August 202617 peakMonday 24 August 202614 peakTuesday 25 August 202613 peakWednesday 26 August 202613 peakThursday 27 August 202611 peakFriday 28 August 202615 peakSaturday 29 August 202615 peakSunday 30 August 202620 peakMonday 31 August 202616 peakTuesday 01 September 202614 peakWednesday 02 September 202616 peakThursday 03 September 202614 peakFriday 04 September 202616 peakSaturday 05 September 202621 peakSunday 06 September 202624 peakMonday 07 September 202626 peakTuesday 08 September 202616 peakWednesday 09 September 202615 peakThursday 10 September 202613 peakFriday 11 September 202615 peakSaturday 12 September 202618 peak
Daily peakEvery hourly sample

All time

133 months, September 2015 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.

03136269401k2015201720192021202320242026September 20151,160 monthly peakOctober 2015246 monthly peakNovember 2015247 monthly peakDecember 2015238 monthly peakJanuary 2016259 monthly peakFebruary 2016104 monthly peakMarch 2016144 monthly peakApril 2016106 monthly peakMay 201676 monthly peakJune 2016122 monthly peakJuly 2016106 monthly peakAugust 201670 monthly peakSeptember 2016107 monthly peakOctober 201665 monthly peakNovember 201672 monthly peakDecember 201698 monthly peakJanuary 2017101 monthly peakFebruary 2017181 monthly peakMarch 201770 monthly peakApril 201745 monthly peakMay 201746 monthly peakJune 2017115 monthly peakJuly 201770 monthly peakAugust 201743 monthly peakSeptember 201742 monthly peakOctober 201739 monthly peakNovember 201762 monthly peakDecember 201769 monthly peakJanuary 201861 monthly peakFebruary 201853 monthly peakMarch 201840 monthly peakApril 201840 monthly peakMay 201841 monthly peakJune 201855 monthly peakJuly 201859 monthly peakAugust 201843 monthly peakSeptember 201840 monthly peakOctober 201842 monthly peakNovember 201849 monthly peakDecember 201837 monthly peakJanuary 201932 monthly peakFebruary 201948 monthly peakMarch 201940 monthly peakApril 201945 monthly peakMay 201938 monthly peakJune 201930 monthly peakJuly 201926 monthly peakAugust 201926 monthly peakSeptember 201927 monthly peakOctober 201923 monthly peakNovember 201923 monthly peakDecember 201950 monthly peakJanuary 202058 monthly peakFebruary 202040 monthly peakMarch 202041 monthly peakApril 202033 monthly peakMay 202034 monthly peakJune 202033 monthly peakJuly 202032 monthly peakAugust 202032 monthly peakSeptember 202023 monthly peakOctober 202029 monthly peakNovember 202027 monthly peakDecember 202024 monthly peakJanuary 202124 monthly peakFebruary 202145 monthly peakMarch 202149 monthly peakApril 202164 monthly peakMay 202156 monthly peakJune 202130 monthly peakJuly 202127 monthly peakAugust 202130 monthly peakSeptember 202129 monthly peakOctober 202144 monthly peakNovember 202136 monthly peakDecember 202129 monthly peakJanuary 202236 monthly peakFebruary 202227 monthly peakMarch 202227 monthly peakApril 202249 monthly peakMay 202256 monthly peakJune 202230 monthly peakJuly 202224 monthly peakAugust 202224 monthly peakSeptember 202228 monthly peakOctober 202225 monthly peakNovember 202223 monthly peakDecember 202225 monthly peakJanuary 202329 monthly peakFebruary 202330 monthly peakMarch 202332 monthly peakApril 202343 monthly peakMay 202332 monthly peakJune 202327 monthly peakJuly 202332 monthly peakAugust 202335 monthly peakSeptember 202334 monthly peakOctober 202331 monthly peakNovember 202326 monthly peakDecember 202323 monthly peakJanuary 202426 monthly peakFebruary 202428 monthly peakMarch 202468 monthly peakApril 202457 monthly peakMay 202428 monthly peakJune 202426 monthly peakJuly 202423 monthly peakAugust 202429 monthly peakSeptember 202423 monthly peakOctober 202427 monthly peakNovember 202420 monthly peakDecember 202419 monthly peakJanuary 202522 monthly peakFebruary 202524 monthly peakMarch 202523 monthly peakApril 202525 monthly peakMay 202530 monthly peakJune 202529 monthly peakJuly 202525 monthly peakAugust 202526 monthly peakSeptember 202522 monthly peakOctober 202521 monthly peakNovember 202522 monthly peakDecember 202522 monthly peakJanuary 202618 monthly peakFebruary 202627 monthly peakMarch 202620 monthly peakApril 202623 monthly peakMay 202625 monthly peakJune 202634 monthly peakJuly 202627 monthly peakAugust 202626 monthly peakSeptember 202626 monthly peak
Monthly peak

The last four months

Show:

The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.

07152229July 2026August 2026September 2026October 2026July 202627 peak — daily detail belowAugust 202626 peak — hourly detail belowSeptember 202626 peak — hourly detail below
Monthly peakHas finer data

July 2026

31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.

0715222901 Jul06 Jul11 Jul16 Jul21 Jul26 Jul31 JulWednesday 01 July 202621 peakThursday 02 July 202617 peakFriday 03 July 202619 peakSaturday 04 July 202622 peakSunday 05 July 202619 peakMonday 06 July 202618 peakTuesday 07 July 202627 peakWednesday 08 July 202619 peakThursday 09 July 202616 peakFriday 10 July 202621 peakSaturday 11 July 202620 peakSunday 12 July 202619 peakMonday 13 July 202615 peakTuesday 14 July 202616 peakWednesday 15 July 202613 peakThursday 16 July 202613 peakFriday 17 July 202620 peakSaturday 18 July 202622 peakSunday 19 July 202620 peakMonday 20 July 202614 peakTuesday 21 July 202615 peakWednesday 22 July 202618 peakThursday 23 July 202616 peakFriday 24 July 202621 peakSaturday 25 July 202622 peakSunday 26 July 202622 peakMonday 27 July 202618 peakTuesday 28 July 202620 peakWednesday 29 July 202622 peakThursday 30 July 202616 peakFriday 31 July 202624 peak

August 2026

31 days as the curve, each the highest figure that day. Behind it, 169 hourly samples from 14 Aug, which is as far back as the source keeps every hour. Weekends are shaded.

0714212801 Aug06 Aug11 Aug16 Aug21 Aug26 Aug31 AugSaturday 01 August 202626 peakSunday 02 August 202624 peakMonday 03 August 202623 peakTuesday 04 August 202619 peakWednesday 05 August 202623 peakThursday 06 August 202626 peakFriday 07 August 202620 peakSaturday 08 August 202626 peakSunday 09 August 202619 peakMonday 10 August 202621 peakTuesday 11 August 202619 peakWednesday 12 August 202615 peakThursday 13 August 202617 peakFriday 14 August 202614 peakSaturday 15 August 202617 peakSunday 16 August 202619 peakMonday 17 August 202612 peakTuesday 18 August 202614 peakWednesday 19 August 202618 peakThursday 20 August 202615 peakFriday 21 August 202613 peakSaturday 22 August 202617 peakSunday 23 August 202617 peakMonday 24 August 202614 peakTuesday 25 August 202613 peakWednesday 26 August 202613 peakThursday 27 August 202611 peakFriday 28 August 202615 peakSaturday 29 August 202615 peakSunday 30 August 202620 peakMonday 31 August 202616 peak

September 2026

12 days as the curve, each the highest figure that day. Behind it, 123 hourly samples. Each dip is a night. Weekends are shaded.

0714212801 Sep03 Sep05 Sep07 Sep09 Sep11 SepTuesday 01 September 202614 peakWednesday 02 September 202616 peakThursday 03 September 202614 peakFriday 04 September 202616 peakSaturday 05 September 202621 peakSunday 06 September 202624 peakMonday 07 September 202626 peakTuesday 08 September 202616 peakWednesday 09 September 202615 peakThursday 10 September 202613 peakFriday 11 September 202615 peakSaturday 12 September 202618 peak

October 2026

NOBUNAGA'S AMBITION: Sphere of Influence was released on 1 Sep, 2015.

Not out yet.There is nothing to draw for this month.
Nothing here is interpolated or estimated; where a sample is missing the line is broken.

Game information

Updated 12 Sep 2026, 22:20 UTC
App ID
392470
Last updated
06 Oct 2016 build 1320100
Developer
KOEI TECMO GAMES CO., LTD.
Publisher
KOEI TECMO GAMES CO., LTD.
Release date
1 Sep, 2015
Platforms
Windows
Download size
5.80 GB
Install size
7.03 GB
Genres
Strategy
Game modes
Single-player
Controller support
Unknown
Metacritic
70

Features & support

Steam features

Steam Trading CardsSteam CloudFamily Sharing

Controllers & input

Accessibility

Popular tags

StrategyHistoricalGrand StrategySimulationRTSWarWargameCharacter CustomizationReal Time TacticsImmersive Sim3DDiplomacyMilitaryTacticalAlternate HistoryResource ManagementReplay ValueSingleplayerGreat SoundtrackAddictive
About this gameFull description from Steam
The renowned historical simulation series returns with enhanced features in "Nobunaga's Ambition: Sphere on Influence". Take the role of the legendary Warring States Daimyō (Warlords) such as "Nobunaga Oda" and "Shingen Takeda" to work your way towards unification by making best use of domestic affairs, diplomacy and battles against the fierce Warlord neighbors. The installment has numerous enhancements and features to it's predecessor "Nobunaga's Ambition: Souzou" by expressing the Warring era's highlight, the "Battle of Sekigahara" in the highest quality ever to date in the franchise's history. Also the numerous in game procedures required in making progress towards unification has seen a major revamp in all areas. - Recreate the "Battle of Sekigahara" your way: Realistic as it gets, simultaneous strategy executions recreating a realistic battle condition. New systems are in place such as the "Alliance" command allowing you to join hands with other Warlords or "Corps under the command system" allowing you to take full control of the numerous unique Warlords under your command. - Command your troops on the ever changing battlefields: Battles has become more dynamic with new fields and situations being added requiring more tactical planning and troop controls than before. - New scenarios and "Sengoku Chronicle" creating a dynamic Warring State Era: 4 new scenarios tracing the historical facts are in place such as "Birth of Nobunaga" (1534), "Battle of Sekigahara" (1600) with New "Sengoku Chronicle" seeing over 500 Officers being added to the character listing. - New features based on player feedbacks: Enriched game play experience with an enhanced edit features, new objects and Imperial Diplomacy to name some additions from the strong requests from our fans!
Content & age ratings5 regional ratings

Regional ratings

DEJUS16Violência · Temas sensíveis · Atos criminosos
ESRBtMild Language · Mild Violence
IGRS15Rokok dan/atau rokok elektronik, minuman beralkohol, narkotika, psikotropika, dan/atau zat adiktif lainnya · Kekerasan
OFLCpgMild battle violence · Coarse language · Online interactivity
PEGI12Bad Language · Violence
System requirementsMinimum and recommended hardware

Minimum

Minimum: OS: Windows® Processor: Pentium®4 1.6GHz Memory: 1 GB RAM Graphics: VRAM 128MB over DirectX: Version 9.0c Network: Broadband Internet connection Storage: 7 GB available space Sound Card: 48GHz/16bit Additional Notes: Shader model: Version 3.0, 1024 x 768 or 1280 x 720 minimum display resolution

Recommended

Recommended: OS: Windows® Processor: Core2 Duo 2.0GHz Memory: 1 GB RAM Graphics: VRAM 512MB over DirectX: Version 9.0c Network: Broadband Internet connection Storage: 7 GB available space Sound Card: 48GHz/16bit Additional Notes: Shader model: Version 3.0, 1024 x 768 or 1280 x 720 minimum display resolution
Supported languages1 languages
LanguageFull audio
English●

A blank audio cell means full audio was not marked in the returned language list.

Screenshots & trailersScreenshots and trailers

Trailers

AchievementsTotal count and selected achievements

6 developer announcements, Oct 2016 to Feb 2017 · times in UTC

February

  1. KOEI TECMO Publisher Weekend began!

    Offer ends February 13th, Monday, at 10am Pacific Time. Not only "NOBUNAGA'S AMBITION: Sphere of Influence" but other KOEI TECMO games are on sale now. For "NOBUNAGA'S AMBITION: Sphere of Influence", ALL of the DLCs are also being sold at…

    KTG_Dev_Messenger
  2. KOEI TECMO Publisher Weekend began!

    Offer ends February 13th, Monday, at 10am Pacific Time. Not only "NOBUNAGA'S AMBITION: Sphere of Influence" but other KOEI TECMO games are on sale now. For "NOBUNAGA'S AMBITION: Sphere of Influence", ALL of the DLCs are also being sold at…

    KTG_Dev_Messenger

October

  1. Major update for "Sphere of Influence - Ascension"

    "NOBUNAGA'S AMBITION: Sphere of Influence - Ascension" has just added English interface and subtitles. http://store.steampowered.com/app/375450/ To celebrate this major update, the bonus DLCs and 20% discount are being offered currently.…

    KTG_Dev_Messenger
  2. Major update for "Sphere of Influence - Ascension"

    "NOBUNAGA'S AMBITION: Sphere of Influence - Ascension" has just added English interface and subtitles. http://store.steampowered.com/app/375450/ To celebrate this major update, the bonus DLCs and 20% discount are being offered currently.…

    KTG_Dev_Messenger
  3. Update Information Ver. 1.0.0.1 (2016-10-6)

    The following bug fixes were made: - A bug in which the game would sometimes stop when attempting to start the game by using borderless window mode in Windows 10 has been fixed. - Fixed other minor bugs.

    Patch notes
  4. Update Information Ver. 1.0.0.1 (2016-10-6)

    The following bug fixes were made: - A bug in which the game would sometimes stop when attempting to start the game by using borderless window mode in Windows 10 has been fixed. - Fixed other minor bugs.

    KTG_Dev_Messenger

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