Save system

• Manual saving and loading into a single slot.
• Saving the character's position and state.
• Saving the contents of the character's inventory.
• Saving time of day and weather.
• Saving items in the world.

• Saving the state of the AI.
• Saving the contents and state of interactive objects.
• Ability to save to multiple slots, auto save.

AI

• Progression and expansion of infected behavior.
• Optimization and refactoring of the AI system.

Stealth sound

• Added accounting for the range of sound propagation produced by a character.
• Silencers significantly reduce the range of shot sound propagation.
• Posture, movement speed, gear, and clothing affect the range of sound produced by a character's actions.

Fixes

• Fixed bugs with interaction of interactive objects.
• Fixed errors with displaying hints on objects.
• Fixed bugs when interacting with items in inventory.
• Expanded possibilities to manage items in the inventory.
• Minor bug fixes.