Update v1.3.1:

Windows: Removed dependency on vcredist2015, to fix startup issues caused by skipped or broken installations
Scene and Skirmish loading speed improved. This also fixes level load and random map generation not finishing at all on slow graphics devices.
Fixed problems with room floors: black areas, lag when changing rooms with floor cutouts, memory leak
Performance improvements, particularly in late-game
Players with incompatible GPUs now receive a notification during game launch
Balancing: 'Mana Shield' cooldown increased to 20 seconds
Multiplayer balancing: 'Meteor Shower' and 'Frost Bomb' now have reduced stun duration
Fixed the 'Positive Payday' bonus to actually give you money as intended, instead of taking twice as much
Fixed: The Naga did not always prefer to heal your creatures when a group of units including Nagas was directed to attack something
Fixed: The Outside world was sometimes rendered incorrectly during the first few frames
Fixed: Traps and doors were sometimes not being rebuilt after loading a game
Fixed: Certain spells could incorrectly be recast during cooldown
Fixed: Creatures were not resurrected after dropping them into the Crypt, and Snots then putting them on the Defi-Bri-Mat
Fixed two music tracks playing at the same time
Fixed various minor sound/music glitches
Fixed: Marking tiles did not work when ending the drag on the UI
Fixed: Minor tweak to load game menu, to better visualize the different modes
Fixed: The mage's chain lighting spell visualization sometimes caused an incorrect line to be drawn on the screen for one frame
Fixed: On aspect ratios other than 16:9, the main menu image fade was slightly corrupted.
Fixed having two mutually throne room themes enabled at the same time by default (for players who pre-ordered Dungeons 3)
Fixed: Texture of hooks in the Crypt was defective
Fixed: Texture of a Ship was slightly defective
Multiplayer: 'Field of Honor': Heroes spawned in underground portal for players 2 and 3 now behave correctly
"The Shadow of Absolute Evil": Fixed movement of Shadow sometimes getting interrupted after loading a game
"The Prince of Hell": Fixed mouseover text for map specific UI buttons
"The End of Yaina Overproud": Fixed typo in English localization
"The End of Yaina Overproud": Fixed mini map icons for portals
"The Hungry, Hungry Ogre": Player can no longer erroneously pass through a fence
"The End of Yaina Overproud": Prevent Yaina from teleporting to unreachable positions
Show thought bubbles when pressing 'Alt' key
Vortex chamber now adjusts regeneration speed based on room efficiency
Balancing: Mother Worm now has slightly increased attack range
Balancing: Skirmish bosses are now tougher (except in difficulty 'easy')
Balancing: Increased Gobbler spawn rate by 25%
Simplified Chinese: Show subtitles for in-scene dialog
Spanish/Italian: localization fixes
Multiplayer: Do not show enemy Demon Portals through fog of war
Linux: Fix edge scrolling at top of screen
"The Battle of Steelsmith": fixed 'The One-Huge-Army-Building Evil' achievement/trophy not getting triggered in some circumstances
"Everything Has An End…": Moved waypoint so heroes won't attack city_gate
"Everything Has An End…": No longer kill some heroes with exploding barrels in the intro, preventing the achievement/trophy 'The Benevolent Evil' from being awarded
The boulder from the 'Rolling Stone' trap is no longer affected by doors in construction
Research menu: if there is no capacity for more scrolls, the count now turns red
Fixed creature animations in the 'Temple'
Fixed 'Exploding Treasure Chest' sometimes being invisible after loading a game
Spiders, Dragons, and Worms now despawn more rapidly after they are killed
Automatic Drum no longer triggers on defeated heroes
Changes to Guard Room Drum buff: duration increased, affected creatures visualized, and snots are no longer affected
Mouse cursor on guard room drum now visualizes that it can be interacted wih=th
Fixed some UI overlays shown during cinematics
Fixed some minor keyboard input inconsistencies
Don't show empty mission goal tooltip
Reduce tooltip transparency to make them more legible on noisy backgrounds
When finishing the last tutorial, the campaign button in the victory screen openes the main campaign now
Fixed various word wrapping and text clipping issues
Picking up several units via hotkey no longer picks dead units
Fixed room tooltip in Crypta and Temple
Fixed timezone of savegame dates
Co-op: fixed pickup of resources in certain cases
"Dungeon Basics" tutorial: Minor improvement to tutorial highlighting
"The Ashspring Swamplands": Fixed zombie lifebar positions
Fix 'Subtitles' setting to not require restarting the game
Pause Dialog audio when in-game menu is openened
Random map generation: Minor improvements with road connections, corssings, stairs
Fixed AI pathfinding separation
Fix snots not carrying mana balls to the arcanium even though there is capacity