**XashXT Features**

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  * Full compatibility with the original Half-Life entity set 
  * Support for forming complex hierarchies of entities (Parent System) 
  * Mirrors that can skip reflection of any specified object or, conversely, show ordinarily invisible objects 
  * Surveillance monitors (colour and monochrome) 
  * Portals that can take you from one point to another (as in Portal, but more basic) 
  * Weather effects (rain and snow) 
  * A powerful particle system with a standalone visual editor 
  * A system of prefixes for making complex scripted scenes 
  * An extended decal projection system that works on both level geometry and characters (players and NPCs) 
  * Realistic lasers that can be reflected off mirror surfaces (used in gameplay) 
  * A large set of logical entities for implementing any conditions in scripted scenes or complex arrangements 
  * A camera with flexible settings for cutscenes, letting you switch to any character's point of view (including inanimate ones) 
  * Configuration options for setting the attitude of any NPC towards others and towards the player 
  * Dynamic coloured lighting that can project and play an animated texture as a light source 
  * Playback of AVI files on level polygons and brush objects 
  * A 3D skybox for simulating expansive areas 
  * Bloom effects 
  * Supports for HD textures (up to 4096x4096) 
  * Background maps in the game menu (as in Source) 
  * Support for large game levels (32768x32768x32768 units) 
  * Shadow maps for dynamic shadows 
  * More believable lighting 
  * Realistic rigid body physics powered by a third-party engine (PhysX) 
  * Realistic water 
  * Dynamic day and night cycles