Defines core AI behaviours shared by actor variants.

Specializes an actor by defining their appearance, weapon use, grenades, health, and dropped equipment.

A springy antenna widget which can be attached to model markers, as seen on the Warthog and Scorpion. Widgets can be added to any object.

Represents the physical characteristics and appearance of characters like Elites, Marines, Cortana, and the player.

Stores texture data like sprite sheets, environment maps, normal maps, and more. Commonly (but not exclusively) referenced by shaders.

Defines rotational constraints for the game's camera when controlling bipeds or occupying vehicles (e.g. prevents looking all the way up or down).

Creates a continuous screen shake and controller vibration within a radius of a sound_looping source. This tag class is not used in any stock maps and the effect only applies while certain damage_effect are also applying to the player.

Contrails are trail-like repeating bitmap effects which can be attached to any object, optionally to one of their markers. Commonly used for projectiles, but also for the Banshee's wingtips.

Properties for the application of damage including material modifiers, screen effects, acceleration, and area of effect.

Used for bullet holes, blood, burns, signs, and other 2D surface effects.

Determines the mix and appearance of small 2D detail objects like grass, which are painted onto a BSP in Sapien.

Parent tag for devices, controlled objects which have powered on/off states.

Used for interactive switches and buttons to operate device_machines like doors and elevators.

Used for dynamically toggled light sources or decorate lighting objects.

An object which can animate between open and closed states, like doors and elevators.

Gives units situational sounds, such as when taking damage or fleeing.

A multi-purpose tag used for responses to various events like material impacts, sound effects, and detonations.

Used for powerups, health packs, non-live grenades, and ammo pickups.

Properties for a simulated cloth-like material which can be attached to objects.

Describes the appearance of fog planes.

Stores the render model of objects in the Gearbox port of the game (and its derivatives).

Contains global configuration related to singleplayer, multiplayer, rasterizer data, the HUD, and more.

Used to create glowing effects like the Elite's energy sword.

Contains the text for messages that appear on the HUD like objectives and interactions.

Parent tag of weapon, garbage, and equipment. Represents a small moveable object with point-like physics.

A 2D sprite which can fade by distance and angle. Can be part of a light or attached to the BSP.

A dynamic light source which can be attached to objects and effects.

Describes a dense line of glow particles, commonly used for projectile tails.

Spawns effects when moving objects interact with surfaces, like tread marks, splashing footsteps, and scattering rocks.

Used for the global health and shield HUD meters.

Stores the render model of objects in the original Xbox version of the game.

Contains the collision mesh (also referred to as hitbox) for objects as well as information about health and shields.

Models the dynamic physics and propulsion of vehicles.

Used only by Sapien to represent interactive handles/markers.

Controls how simulated points points physically interact with the environment.

Short-lived objects used for weapon projectiles and thrown grenades.

The main "root" tag for a multiplayer, singeplayer, or UI map. Contains data about spawn locations, objects, BSPs, skies, scripts, and more.

Contains geometric, lighting, weather, and other data for the playable spaces in which all objects are placed. Singleplayer maps often use multiple BSPs.

Fixed decoration objects like boulders, plants, and crates. Placed in the level using Sapien.

General-purpose opaque and alpha-tested shader used for scenario_structure_bsp materials.

General-purpose opaque shader used for object materials.

A version of shader_transparent_chicago which contains an additional 2-stage block for supporting older graphics hardware.

A transparent shader type supported by H1X and H1A only.

Used for transparent materials with an incrementally scaled area, such as first person (not HUD) heat meters for plasma weapons and the Warthog's speedometer.

Used for energy shields like those on bipeds.

Defines a skybox with light sources for lightmaps and atmospheric fog.

Contains sound data such as sound effects and music and parameters affecting how sounds are played by the sound system.

Identical to scenery but with collision rules like device_light_fixture. Used for invisible emitters of localized sound like rivers and waterfalls.

Parent tag of bipeds and vehicles, containing fields common to these AI-driven or controllable objects.

Driveable or occupiable units with dynamic physics, such as the Warthog and cryo pod.

Used for both weildable weapons and those attached to vehicles.

Defines the appearance and behaviour of weather particles like rain and snow.

Describes the speed and variation of wind in a BSP cluster, affecting local point_physics like flags and weather.

Spheroid is an unused leftover tag class from earlier in Halo's development. Although references to it can be seen in the H1CE HEK, it no longer exists in the H1A-EK.

This group ID can still be found in leftover references in some stock scenario tags, but the tag itself no longer exists. It was probably replaced by item_collection. Scenarios which are exported to text format and re-imported using HEK Guerilla may cause HEK Sapien to crash due to this unrecognized tag class. H1A Guerilla is immune to this issue.