Patch 3.1 (Age of Empires II)

Patch 3.1 is a patch The Forgotten, released on December 5, 2013. It addressed various bugfixes, improvements and campaign fixes.

General Gameplay

 * Pathing has been revisited to alleviate the issues introduced in patch 3.0. We have several changes we are finalizing and testing, however will initially be moving back to 2.8 pathing until those are finalized (coming in 3.2).
 * AI opponents will now properly build trebuchets. Really.
 * 2.8 save game files now load properly.
 * Fixed lag issues caused by AI villagers getting stuck creating buildings.
 * Added more sprite optimizations to the base game (this will also fix the scout and paladin animation bugs).
 * Fixed a game crash that occurred when more than 50 civilians are defending against a unit. Stop sacrificing your poor villagers!
 * Increased max scroll speed by 50% (eventually we’ll find a sweet spot people are content with)
 * The gates that are built with the "palisade wall" command are now palisade gates (this affects the new map Hideout).
 * Fixed multiple issues when the game ends while in various menus.
 * Campaign victories now generate correct stats and achievements
 * Monasteries will no longer sometimes spawn in water during CTR (capture the relic) games on Nomad
 * Eagle scouts and Eagle warriors now show up correctly in combat units list
 * Active fishing boats now show up in economic statistics
 * (Elite) Huskarls built in the barracks and (Elite) Tarkans built from the stable appear in the military units list.
 * Numerous campaign bugfixes.

Multiplayer

 * Before a multiplayer game start, a checksum of your game data file will be compared with others in your lobby. If you have a different data file as the host (because you or the host has a workshop mod for example), the game will not start. This should prevent some of the OOS issues people are having.
 * Fixed some issues that would occur when inviting someone to a lobby that was in a different mode (HD or Forgotten).
 * AOF - Fixed crash that would occur when you desynced in multi-player while in treaty mode.
 * AOF - Treaty mode will now properly end when loading a saved multiplayer game.

Achievements

 * The "Achievement will not progress because you used a cheat code" message will only appear if you used a cheat code in the present game. Previously, the message would re-appear in every subsequent game after you used cheat codes for the first time.

UI Fixes

 * The "HD Version" tech tree now displays the correct descriptions for the civs (was displaying descriptions from "The Forgotten")
 * Master volume and Music volume sliders now work correctly in the in-game options menu.
 * The "star" in the achievements screen for advancing to the imperial age the fastest has been fixed.
 * The "Player colors" command now properly updates when you use the options menu or the hotkey.
 * Players are now assigned to the correct civs in the MP restore screen.
 * Expanded the rank text area on the main screen so the text can no longer go out of bounds (had problems with some languages).
 * "ai\RandomGame.per2" no longer (occasionally) shows up as the scenario name in the lobby browser
 * The correct rollover text will now appear when selecting a map type.
 * Corrected description for "Blind Random" map location.
 * Expansion maps no longer show up in HD-mode scenario editor
 * Changed "Player colors" to "Unique Player colors" and "Garrisoning" to "Alt key Garrisoning" to add clarity.
 * Fixed a bug where if you used the “Cntl” key in the hotkey setting to save games, multiplayer games would save improperly.

Language Fixes

 * Translated the remaining text for the Dutch language.
 * The Japanese campaign voice acting is now in Japanese (was using English audio previously)