Age of Empires 2 Definitive Edition Update 51737 Patch Notes – August 10, 2021

Age of Empires 2 Definitive Edition (AOE 2) update 51737 is now available to download on PC (Steam). According to Age of Empires 2 patch notes, the latest update added balance changes and bug fixes. Apart from this, Age of Empires 2 (AOE 2) patch 51737 also includes general stability fixes.

Previously, a big update was released with bug fixes. Unfortunately, many players are still experiencing several issues while playing the game.

Today’s Age of Empires 2 Definitive Edition patch 51737 will fix a few of these issues.

Age of Empires 2 Patch Notes – August 10, 2021

On top of all the new changes, features, and improvements coming with today’s build, Dawn of the Dukes introduces two all-new civilizations: the Poles and the Bohemians! Experience 3 new fully-voiced campaigns and 16 new Achievements!

Now, let’s take a quick look at some of the changes coming with today’s update:

  • Celebrate all things Age of Empires with the brand-new Jungle Summer Vacation event, where you can unlock awesome rewards!
  • We’ve added Polish language support!
  • Units which were commanded using Attack Move no longer try to get into formation when reaching the destination they were sent to while enemy units.
  • A number of balance updates to gameplay, civilizations, and maps.
  • Plus several bug and crash fixes!
Two New Civilizations!

The Poles

The Poles are a cavalry civilization. While their western neighbors employed deadly companies of heavily armored cavalry, the Poles leveraged their strengths to evolve more towards what modern eyes might class as medium cavalry. While they could not always triumph over their rival counterparts on an individual basis, they emphasized maneuverability, organization, and sheer numbers at a time when warfare was shifting away from the typical medieval model.

The Bohemians
The Bohemians are a gunpowder and monk civilization. Threatened both militarily and ideologically on nearly all sides, the Bohemians responded with groundbreaking innovations in both spheres. Novel weaponry, battle tactics, and defensive strategies shattered the numerous feudal and professional armies of their invading rivals, while scholarly thought and debate inaugurated one of the earliest successful social revolutions in early modern European history. Bohemian armies compensated for a lack of sheer brute strength with an uncanny ability to outwit, outmaneuver, and counter their opponents.

For a deep dive into the Poles and Bohemians, and more, view the official page for Age of Empires II: Dawn of the Dukes right [url]HERE[/url]!


Stability & Performance
  • Fixed a crash that could occur under specific circumstances when selecting/interacting with control groups.
  • Fixed a crash that could occur when the player sent messages in a Multiplayer lobby at the same time as the host closes the lobby.
  • Fixed a crash that occurred when receiving an in-game invitation while playing a single player game and having the in-game menu open.
  • Fixed a crash that consistently occurred in a custom scenario related to a unit transforming into another.
  • Fixed a performance issue that occurred during the first few seconds of gameplay on many Random Map Scripts.
  • Fixed a soft lock issue that could occur under specific circumstances when attempting to load into a match hosted by a user with a data mod enabled.
  • Fixed a soft lock issue that could occur in-game when the resign dialogue was opened while the match ended.
  • Fixed a crash/hard lock issue that could occur under specific circumstances when disconnecting from the internet during ranked matchmaking.
  • Fixed an issue where terrain ambience tracks other than Forest ambience would fail to play. Terrain ambience types that can be heard in-game are as follows:
    • Desert
    • Fog
    • Snow
    • Jungle
    • Lake
    • Ocean
    • Forest
    • Plains
  • In Battle Royale game mode, a special kind of music now plays when the Corruption fog approaches your vicinity.
  • Tweaked the way some melee attack sounds are played in large battles.
  • Post-game timelines now properly align players with their own graph, players are sorted by team (previously playernumber).
  • The amount of secondary projectiles is now included in the attack display for units which fire several projectiles.
  • Fixed an issue in MP lobbies with the “Hide Civilization” option enabled where players were able to see another player’s civilization when switching to their playercolor.
  • Steam Users who want to create/edit clans no longer have to sign into Xbox Live to do so.
  • Fixed an issue where several dialogs such as the Civilization selection dialog did not close when the user pressed the Escape key.
  • When a player creates a MP lobby who has an out of date dataset mod a proper error message will now display explaining the issue.
  • Serjeants spawned by the First Crusade technology no longer default to using the aggressive stance when the Default Aggressive Unit Stance is disabled.
  • The “going above and beyond” cheat code is now available to all players.

Adjusted several AI player controlled civilizations in various campaign missions for better historical accuracy, anticipating the launch of the new Dawn of the Dukes expansion:

Genghis Khan

  • Mission 5: Polish → Poles civ; Bohemians → Bohemians civ


  • Mission 1: Bohemia → Bohemians civ
  • Mission 2: Poland → Poles civ


  • Mission 5: Poles → Poles civ
  • Increased difficulty of the Bapheus and Hastings co-op scenario based on community feedback, especially on the hard difficulty level.


  • (Elite) Steppe Lancer: reload time lowered 2.3 ▶ 2.0.
  • Hand Cannoneers: hitpoints increased from 35 ▶ 40.
  • The speed of Bullet projectiles increased from 5.5 ▶ 7.5.


  • Howdah: Gives Battle Elephants +1/+2 armor (from +1/+1 ▶ +1/+2).


  • Fixed an issue where the hit points of Watch Towers in the Castle Age and Siege Workshops in the Imperial Age were lower than expected.


  • Town Patrol is now free and instantly researched.


  • Team Bonus changed to Farms +10% food (from +45 food ▶ +10% food).


  • Archery Ranges and Stables now cost -100 wood.


  • Can now research and train the Winged Hussar instead of Hussar.
  • Lose access to the Blast Furnace technology.


  • Leitis (Standard & Elite): Increased attack from 12/14 ▶ 13/16.


  • Gold Mines last 30% longer (replaces the free Gold Mining technology bonus).


  • The Sicilians now start with an extra 100 Stone.
  • Team Bonus effect changed to remove the cost of the first trained Transport Ship and train it instantly.


  • Organ Gun [Standard & Elite]: Secondary projectiles now consistently deal 2 damage as opposed to 1 or 2 depending on whether they hit their primary target.


  • Now receive access to the Siege Onager upgrade.


  • Scutage: replaced with the Hauberk technology.
  • Hauberk: this unique technology grants Knights +1 melee and +2 pierce armor.
  • Autumn season now includes the new birch tree type accompanying the new Dawn of the Dukes expansion 50% of the time.
Map Updates
  • Acclivity: Unbuildable rock terrain now generates exclusively on slopes, making it more evident where you can build and where you cannot.
  • Acclivity: Fixed a rare bug that caused one or more players to not generate forests around their initial town center.
  • Amazon Tunnel: Adjusted the carved player bases to have slightly more space and appear more natural.
  • Arabia: Each player now has 3 starting forests positioned towards the edge of the map.
  • Arabia: The players’ starting forests generate further away.
  • Arabia: The front of each player’s base is more open making it more vulnerable to attacks.
  • Arabia: Hills can now appear closer to players’ town centers.
  • Arabia: The third gold pile for each player is generated further away.
  • Arabia: Extra gold, stone, as well as relics, are now generated per player and therefore more fairly balanced.
  • Arabia: Slight variance has been added to the the circular positioning of players’ bases.
  • Arabia: Cliffs and water oases have been removed.
  • Arena: Improved the placement of lumbercamps on Empire Wars.
  • Frigid Lake: Minor aesthetic changes.
  • Lowland: Fixed a rare issue that could cause elevation to not generate properly across the entire map.
  • Marketplace: Minor aesthetic changes.
  • Migration: Relics now spawn correctly on all map sizes.
  • Northern Isles: Forests have been moved slightly further away from the player’s town centers.

Random Map Scripting

  • Added a new way to paint actor areas without having to create objects, implemented new function: create_actor_area x y id radius.

Diplomacy options are no longer greyed out with non-AI players when the “Teams Locked” option is disabled (always enabled in ranked gameplay).

  • Fixed an issue where players who join a lobby using an outdated data mod were booted from the lobby after downloading, with the civilization selection dialog still being open if opened in the lobby.
  • Fixed an issue where hosts of Custom Scenario lobbies were unable to change their color until other people joined.
  • Optimized the AI players’ strategic decision-making in a wide variety of areas, including strategy selection.
  • AI players are now less eager to pick a fight while critical army upgrades are still being researched.
  • Improved the AI’s ability to advance to the next age earlier without sacrificing economy, with a bigger effect for certain civilizations.
  • Improved performance on various different maps such as African Clearing.
  • Fixed an issue with the AI’s dark age gatherer distribution calculation on nomad-style maps.
  • Fixed an issue where AI players rarely didn’t ungarrison boats from their docks when expected.
  • AI players may now task Serjeants to help construct Donjons instead of only using villagers.
  • Extreme difficulty: Improvements to the effectiveness of the Militia rush strategy.
  • Extreme difficulty: Implemented a completely new Scout Cavalry rush strategy which we’re keeping an eye on to improve.
  • Extreme difficulty: Increased likelihood of AI players retreating their cavalry from enemy spearman type units.
  • Extreme difficulty: Fixed an issue where the AI did not lure ibex to their towncenter to hunt as it would with deer or other similar animals.
  • Extreme difficulty: The AI is more likely to succeed in saving a villager’s life that is being targeted by wild animals or enemy units by forcing it to garrison when possible and necessary.
  • Fixed an issue where Cuman AI players didn’t advance past the Feudal Age in Deathmatch and Infinite Resources games.
  • Improved AI player performance on Infinite Resources settings.
  • The AI (HD Version) will no longer taunt the player with a betrayal message while unsuccessfully attempting to switch teams while a treaty is still ongoing.
  • Units which were commanded using Attack Move no longer try to get into formation when reaching the destination they were sent to while enemy units are in sight instead of fighting those.
  • Wall objects are now being detected when using position-target, position-focus or position-enemy.
  • Fixed an issue with up-chat-data-to-player and up-chat-data-to-player-using-id where they did not always output chat to the intended player.
  • Added Polish language support!
  • Added new flags for Blast Attack Level attribute to control the blast damage style:
    • 4: Logistica style (5 damage to surrounding units).
    • 8: War Elephant style (50% of the unit’s attack).
    • 16: Battle Elephant style (25% of the unit’s attack).
    • 32: Lechitic Legacy style (33% of the unit’s attack).
    • 64: Reduces the blast damage with distance (works only for melee units).
  • Added new flag for Enable Smart Projectiles attribute:
    • 2: Missed projectiles deal 100% of their damage if they hit another target (instead of the default 50%).
Scenario Editor
  • Two new terrain types have been added accompanying the Dawn of the Dukes expansion’s release: Birch Forest and Swamp.
  • The Change Object Civilization Name function now works with Set Area.
  • Objects which were disabled in scenario can now properly be re-enabled later if the scenario game was loaded from a saved game file.
  • Fixed a bug where researching the Anarchy technology by trigger for civilizations other than Goths didn’t enable Huskarls to be trained from the barracks.

Download free Age of Empires 2 update 51737 on PC(Steam).

Jack Johnson
Jack Johnson
Jack Johnson mainly writes about game-related news and updates. He is a passionate gamer, music lover, and traveler.