Add-ons client

• Show the server ID in the Add-ons Manager
• The add-ons server identifier (e.g. 1.18) is now displayed on the bottom left after the server address. If debug mode is enabled the server software version is also shown.

Campaigns

• Descent into Darkness
  • S3: player now no longer gains any exp upon killing rats and crawlers, buffed puzzle exp to compensate

• Eastern Invasion
  • Prevent Dacyn from picking up a different staff (issue #8885)
  • Reduce Barrow/Pyre Wight vulnerability to arcane
  • S14: indicate uncleared swamp hexes with "swamp reed" images
  • Many minor bugfixes

• Liberty
  • Custom unit and portrait for Lord Maddock

• Sceptre of Fire
  • S7: fewer and slower enemies, to balance the buff to the Elvish Outrider unit type

• Tutorial
  • Better timing for some of the hints

• Under the Burnings Suns
  • S01: the luck involved in getting units from villages is now fairer

• Secrets of the Ancients
  • S16: Keep Crelanu within his ring of protective holy waters (issue #8361)

• Winds of Fate
  • Avoid a Lua error that only triggered on Windows in locales that use commas as the decimal separator
  • Rebalanced enemies and enemy gold from S6 onwards
  • S08: clarify the objectives

• World Conquest Fix World Conquest's Help dialog showing double scrollbars due to the left tree having it's vertical scrollbar disabled. Changed both vertical and horizontal scrollbar modes to automatic. (issue #8576)

Editor

• Allow loading .mask files
• New UI in the Scenario Editor that allows to create custom unit types, accessible by Unit menu > New Unit Type.

Multiplayer

• The default settings for the timer are now 240 seconds turn bonus, with no action bonus
• The full map is no longer revealed in linger mode by default, so it behaves similarly to SP mode for campaigns
• Refactor the code which determines when actions can be undone, and when actions are sent to the server
• In the Aethermaw map, Sulla's title has been changed to Aether Mage and prose slightly rewritten to include this change.
• Fixed some old paths to unit images being used in Aethermaw (issue #8432)
• Moved the Dunefolk into Default era. The "+Dunefolk" eras have been removed.

Lua API

• Overhaul of the API to use named tuples instead of `data[1]`, `data[2]`, etc
• Locations returned by the API are now named tuples, so their data can be accessed as `location.x` and `location.y`
• Objects with `x` and `y` data members can generally be passed to APIs that expect a location

Packaging

• Fixed build with Boost 1.85
• Increased the minimum required SDL version from 2.0.10 to 2.0.18 for non-macOS platforms (macOS already requires 2.0.22)

Terrain

• Oasis is now a mixed terrain, adding shallow water to the base terrain, and defaulting to Sand as the base terrain
• The help browser now considers the default base of mixed terrains when adding them to the help tree

Translations

• Updated translations: Arabic, Bengali, British English, Bulgarian, Chinese (Traditional), Czech, Dutch, Finnish, French, German, Italian, Japanese, Norwegian, Polish, Russian, Slovak, Spanish, Ukrainian
• Added new font "Lohit-Bengali.ttf" to support Bengali translation

Units

• Elvish Avenger - decreased ranged attack from 114 to 104, decreased cost from 66 to 60
• Elvish Sharpshooter - decreased ranged attack from 125 to 105, decreased cost from 62 to 55
• Elvish Shyde - decreased ranged slow attack from 83 to 73, decreased ranged magical attack from 143 to 103, decreased cost from 69 to 58
• Elvish Enchantress - decreased ranged slow attack from 74 to 64, decreased ranged magical attack from 134 to 114, decreased cost from 70 to 62, decreased XP requirement from 198 to 180
• Elvish Sylph - decreased ranged magical attack from 165 to 135, decreased cost from 161 to 135
• Added new Fire Wisp unit
• Added portraits for Skeletal Rider, Wyvern, TSGs Eyestalk, TRoWs vampire lady, and an alternative portrait for bears
• Elvish Enchantress - description for 'entangle' changed to 'ethereal web', icon changed.
• Elvish Sylph - description for 'gossamer' changed to 'ethereal web'.
• Mudcrawler and Giant Mudcrawler - increased swamp defense from 40% to 60%, swamp movement penalty reduced from 2 to 1, castle and village defense reduced from 60% to 50%

User interface

• Added a button to the build info dialog to rerun the 1.16 to 1.18 migration tool (issue #7936)
• Use a gold completion laurel for campaigns with only one difficulty setting
• Refined the layout of the Load Game dialog
• New texture-based minimap rendering
• Added a "Teleport Unit" option to the debug menu
• The campaign list in New Campaign dialog now supports filtering campaigns by whether they have been completed and at which difficulty.
• Redesigned story screen layout with new graphics
• Game version dialog redesigned to act as an general purpose About dialog.
• Community dialog moved to About dialog as a new tab. Community button removed from title screen.
• Credits button moved from Title Screen into About dialog.
• Success indication mechanism on buttons. Currently used only for copy buttons.
• Slight reorganization of title screen buttons.
• Add a Community button to the title screen to link to the forums, discord, etc.
• Overhauled the Language selection dialog to make it more informative, including displaying translation progress and making it easier to select highly-incomplete translations.
• Made the Changelog option in the macOS app menu link to the changelog for the particular Wesnoth app version rather than the Git master branch changelog.
• Added unit type level as a filter criterion in the Recruit Unit dialog.
• Added unit race and alignment as additional filter criteria in the Recall Unit dialog.
• Fixed timing issue with the outro screen's text fading effect that made it so fast as to be unnoticeable on many hardware configurations.

WML Engine

• Fixed the Ambush ability not working in Bluff/Glutch Forest terrain
• Multiple fixes to replay handling
• Image Path Functions now accept percentages for scaling sizes
• The AMLAs that a unit has are now accessible via WFL
• new combobox and tab_container widgets
• editability in text box via the editable key
• add [filter_wml] to [experimental_filter_ability(_active)] or [overwrite][experimental_filter_specials]
• Added support for `value="default"` to ability filters to match abilities using their default `value` (by explicit setting or absence)

Miscellaneous and Bug Fixes

• Remove special handling of config directory on Linux, use the userdata folder as on Windows and MacOS (#8848)
• Added new `color_range` palettes `yellow` and `pink`
• Added environment variable `WESNOTH_NO_LOG_FILE`, equivalent to the `--no-log-to-file` command line flag
• Fixed attack calculations when resistances counter `[damage_type]alternative_type=`
• Fixed replays marking achievements as complete (issue #8858)
• Fixed a crash in the recall dialog when turning off all sorting options (issue #8878)
• Fixed clicking on a trait in the sidebar sometimes opening the wrong traits help page
• Removed wesnothds unused threads command line options
• Fixed a bug causing excessive pixellation of scaled images
• General cleanup of unnecessary C++ header file includes
• Trying to load an image filename ending ".jpg" will now automatically try ".webp" if the ".jpg" isnt found.
• Fix: releasing a mouse button at the same time as a dialog pops up sometimes dismissed the dialog immediately (issue #8644)