Patch 0.13.9 (18th July 2016) - Experimental Beta
Changes

- Updated demo campaign tips images.
- Updated/Fixed locale entries.
- Removed --mp-load-game
- Default value for "Lights render quality" graphics options was changed to 1.0. If config.ini contains value lower than new minimum (0.25) it will be reset to the default value.
- Lights are rendered with linear filtering to improve quality for lower "Lights render quality" settings.
- Added tips and tricks for pasting wagon slots and cycling in blueprint book.
- Mods are now sorted alphabetically in the mods list.

Bugfixes

- Fixed transport belt madness map showing an empty message dialog out of nowhere.
- Fixed transport belt madness being impossible.
- Fixed crash on Linux when stdout was closed after starting Factorio.
- Fixed trains of other forces could be seen in the Trains GUI.
- Fixed inserters not saving custom pickup/dropoff when exported through the Lua blueprint interface.
- Fixed robots delivering modules into the recipe input slots instead of the module inventory.
- Fixed performance issue caused by alt mode when some mods are installed and linear filtering is enabled.
- Items stop correctly before a belt deactivated using the circuit network.
- Fixed another case where a biter could get stuck.
- Fixed crash when using --mp-connect to join a game that requires user verification.
- Fixed train GUI would be too big to fit on screen with a large amount of character inventory slots.
- Buildings with backer names containing non-ASCII charecters are generated properly.
- Fixed logistic counts when changing stack sizes of items the player was holding.
- Fixed crash when right-clicking electric pole in Map Editor.
- Fixed crash when building tiles would result in you dying.
- Fixed disabled belts would still move the player.
- Fixed crashes related to changing train conditions in the latency state.
- Fixed line breaking in description titles.
- Fixed typo in description of flooring items.
- Fixed blueprint icons not working as desired when paths where part of the selected area.
- Fixed that a username change wouldn't save if the game crashed.
- Fixed that clicking an alert button could show the wrong alert.
- Fixed flooring placement preview rendered on top of turret base.
- Fixed numpad home/end/other keys not working when numlock was off.
- Fixed that the game password dialog showed the password.
- Fixed that inserters at the very front of trains would sometimes not get enabled when a train would stop.
- Fixed the difficutly settings for scenarios not working.
- Fixed alignment of some pipe covers.
- Fixed the watch-your-step achievement not working.
- Rocket parts from building rockets in the rocket silo now show in production stats.
- Fixed tracked achievements scrolling off screen when un-tracking them.
- Fixed inserter sometimes only dropping one item on the ground before going back.
- Fixed LuaGameScript::active_mods not showing the correct list of mods.
- Fixed signals letting trains pass when the circuit network changes.

Scripting

- Fixed SpritePath to recipe that inherits icon from its result would not be considered valid.
- Fixed crash when setting new research in the on_research_completed event.
- Fixed error during the research completed event being un-clickable.
- Added LuaTile::position read.

For more details, please visit: https://forums.factorio.com/viewtopic.php?f=3&t=29102

Patch 1.24.20823 (15 July 2016)
Please note - save files are not compatible with this update - we recommend completing your current mission before updating (campaign progress is saved)

- Added "Half-Resolution Terrain" graphics option that improves stability on low-spec machines and on larger maps
- Added "Observer Mode" to multiplayer that allows other players to watch games without actively participating.
- If you have a video card with less the 2GB of VRAM, the game will prompt you to play with low graphics settings.
- T3s given slightly more armor/shields
- The Avenger's weapon is no longer able to penetrate building armor.
- PHC Brute squad size reduced from 6 to 3, HP per unit doubled.
- PHC Falcon AA cannon fires more often and does more damage.
- Substrate Mauler primary weapon no longer effective against buildings (it works by super-heating the internals of a unit, buildings are hardened against this)
- PHC Archer now fires two rockets per volley instead of 1, damaged reduced
- PHC Brute primary weapon now fires 6 plasma bolts instead of 4 per volley
- Nemesis primary weapon no longer can penetrate building armor
- Zeus Lightning bolt can no longer penetrate building armor
- Updated the Cerius resource and region connection balance
- Prevent sound spam when a player joins/leaves a 3+ player games lobby
- Medic now prioritizes healing units over buildings.
- Using F3 to select idle ships is no longer creates a very loud noise if several ships are on the screen
- Pausing during nexus explosion no longer causes graphics artifacts
- Pausing no longer causes loud repeating sounds.
- The Substrate AI has better targeting for its "Avatar" orbital ability.
- Slight font size increases to increase UI readability.
- Fixed a crash in caused by a waypoint race condition
- Fixed an audio-related crash in the campaign missions
- The game will no longer crash if the player whose name includes invalid characters joins the global chat.
- Fixed problems with the factory queue not being saved properly

Patch 0.73.615259 (18 July 2016)
GENERAL IMPROVEMENTS & FIXES:

- Fixed issue preventing the AI from firing their superweapons
- Enter now always opens the chat box in team mode (except when there are no allies); shift enter always enters it in all chat mode
- Made the notification for generating default passability more clear about replacing any existing passability
- Added hints to the debrief screens (Not yet translated)
- AI Fix to harvesters not returning to harvesting resources after dodging a superweapon
- Map Editor: Integrating Map Editor textures fix when opening the map properties dialog
- Fixed issue with joined player's star count not going away if they leave the lobby after already playing a previous coop game
- Fix for teams not showing up properly in non-random case on loading screen
- Fixed a series of German translations that were incorrect in the first release

Update (18 July 2016)

- added the Mac version of Necropolis: A Diabolical Dungeon Delve.

Update (18 July 2016)

- added the Linux version of Undertale.