| animation_c | Animation class |
| array_c | Array class |
| bbox_s | A bounding box |
| brush_c | A brush class |
| brushface_c | A brush face |
| collision_s | Collision information |
| engine_interface_c | User supplied functions |
| file_manager_c | File Manager Class |
| file_s | File type |
| fileentry_s | PAK-file entry |
| font_s | A font |
| gui_c | Main GUI controller class |
| gvar_s | Global stuff |
| image_c | Image class |
| initvars_s | Initialization variables struct |
| intersection_s | A plane/xx intersection |
| kmf_c | KMF model class |
| kmf_header_s | A kmf file header |
| kmf_vertex_s | A kmf vertex |
| kmf_vertmodifier_s | Kmf vertex modifier |
| landscape_c | Terrain object |
| node_s | Terrain node |
| lensflare_s | A lens flare |
| light_s | A light object |
| list_c | A double linked list class |
| entry_t | An element in a double linked list |
| md2_c | Md2 model class |
| mesh_s | A 3d mesh |
| model_c | Generic 3d model class |
| net_client_c | A network client |
| net_manager_c | The network manager |
| net_message_header_s | Network message header |
| net_message_ping_s | Ping message |
| net_message_pong_s | Pong message |
| octree_c | An octree class |
| node_t | An octree node |
| pak_header_s | PAK-file header |
| particle_emitter_c | Particle emitter class |
| particle_s | Particle type |
| particle_system_c | Particle system class |
| particle_type_c | Particle type class |
| path_c | A 3d path class |
| node_s | A path's node |
| plane_s | A 3d plane |
| renderer_c | Renderer class |
| shader_s | A texture shader |
| shader_waveform_s | A shader wave form definition |
| shaderpass_s | A single shader pass |
| sound_manager_c | Sound Manager Class |
| sound_s | A sound |
| string_c | A string class |
| texture_manager_c | Texture manager |
| texture_s | Texture type |
| triangle_s | An indexed triangle |
| uibutton_c | GUI-button class |
| uicheckbutton_c | A check button / radio button |
| uiedit_c | GUI-edit field class |
| uievent_s | A gui event |
| uilabel_c | A gui label |
| uiobject_c | Generic gui object |
| uislider_c | GUI-scrollbar class |
| uiwindow_c | GUI-window class |
| vec2_c | 2d vector class |
| vec3_c | 3d vector class |
| vec4_c | 4d vector class |
| vertex_s | A standard vertex |
1.2.18