Starground v4.0 was released on February 23, 2024 as a stable release in the Alpha v4 update series.

Additions

• Added Lamp and Stone Wall
• Introduced the deathcap boss
• Added an F1 control for toggling nighttime darkness
• Gave Splitter their initial functionality
• Added Biofuel, a wood-based fuel four times as efficient as the basic option
• Added the Shredder to destroy inserted items
• Added operating shake animations to selected machines
• Added building-placement sounds, the Deathcap music track, and boss health bars

Changes

• Disabled building land effects while loading to reduce load times
• Hid Ancient Automaton path-debug lines
• Allowed projectiles to pass through walls
• Shortened particle lifetimes from ten seconds to two
• Adjusted flashlight lighting and improved weapon trails
• Reduced the range of player slash sounds and expanded Ancient Automaton attack range
• Updated dungeon and overworld music
• Changed the Crafter recipe to five Iron Ingot and five Copper Ingot
• Revised day-cycle ambient colors and improved the appearance of dropped items

Fixes

• Improved projectile lag correction, enemy health initialization, and weapon trails under lag
• Corrected multiplayer updates for Conveyor, Mover, and splitters
• Removed incorrect leave notices and extra message line breaks
• Prevented enemy-projectile crashes
• Moved damage handling to the server
• Synchronized selected tools and prevented unnecessary cooldown resets

Official announcement

https://steamcommunity.com/games/2793380/announcements/detail/4174344193750800249