I got this straight out of the BUILDHLP.TXT file included with your Duke Nukem CD, I just fixed a few errors.
ACCESSSWITCH and ACCESSSWITCH2: Sprite #130 and Sprite #170 :The Access Switch is used to unlock or activate something when used with a Key Card. Use the Palette to define what card to use. Lo-Tag : Set equal to Activator or ActivatorLocked Lo-Tag to use. Hi-Tag : Set to play sound when activated. Palette : 0 = Blue card 21 = Red card 23 = Yellow card SWITCH : Sprite #132 and all other SWITCHes :The Switch is used to unlock or activate something when activated by space key. Lo-Tag : Set equal to Activator or ActivatorLocked Sprite Lo-Tag to use. Hi-Tag : Set to play sound when activated. Palette : 0 = Normal play 1 = Multi-play only NUKEBUTTON : Sprite #142 :The Nuke Button is used to End a level and goto the stat screen. It can also be used to goto a bonus level. Lo-Tag : Set to 65535 to end a level and go to stat screen Set to 1-11 to go to a bonus level in the same volume. Must have palette adjusted for this to work. Hi-Tag : none. Palette : 0 = Default. 14 = Bonus Level. MULTISWITCH : Sprite #146 :The Multi Switch can activate 4 multiple Activator Sprites. It uses 4 consecutive Lo-Tags to activate each Activator. When first switched, it activates Activator Sprites A and D. The next time it activates Activator Sprites B and A. etc.. C and B.. D and C.. then A and D again. Lo-Tag : Set equal to Activator Sprites A,B+1,C+2,D+3 Hi-Tag : none. DOORTILE5 : Tile #150 and all other DOORTILEs :The Door Tiles can be used to activate Activator Sprites when the player presses upon the wall. Wall Lo-Tag : Set equal to Activator Sprite Lo-Tag to activate. Wall Hi-Tag : none. DIPSWITCH : Sprite #162 :The Dip Switch is used as a combination switch with an Activator or ActivatorLocked Sprite. All DIPSWITCH Sprites with equal Lo-Tags will be used for the combination. Lo-Tag : Set equal to Activator or ActivatorLocked Sprite Lo-Tag. Hi-Tag : 0 = set to off. 1 = set to on. VIEWSCREEN : Spirte #502 :The View Screen is used to view through Cameras (Sprite # 621) placed around the map. It will view through all Cameras with equal Lo-Tags. Lo-Tag : none. Hi-Tag : Set equal to CAMERA1 Sprites #621. CRACK1 : Sprite #546 and all other CRACKs :The Crack Sprite is used to activate explosions,(SE 13) and other effects. Lo-Tag : none. Hi-Tag : Set equal to SE 13 Hi-Tag to activate. Palette : Set to 1 for Multi-play mode only. MIRROR : Tile #560 :The Mirror tile is used to place a mirror in the map. To use it you must make a one-way wall (1 key in build). Put tile #560 on that wall. The sector behind the mirror must be the size of every space that can be seen in the mirror or problems will occur. CAMERA1 : Sprite #621 :The Camera Sprite is used to be able to view through using the VIEWSCREEN Sprite. Lo-Tag : Set equal to the VIEWSCREEN Sprite Lo-Tag to be viewed through. Hi-Tag : Set to amount of turning radius. 0 equals none. Shade : Set to angle of facing down. Angle : Set to direction to point. CANWITHSOMETHING : Sprite #1232,4580,4581,4582 :The CANWITHSOMETHING is used to spawn an object when it is shot. Lo-Tag : Set to Sprite number with a name in BUILD or EDITART to spawn when shot. SEENINE : Sprite #1247 OOZCAN: Sprite #1879 :These Sprites are used to activate explosions,(SE 13) and other effects. It can also be used to time delay explosions. Lo-Tag : Set equal to time delay until explosion. Hi-Tag : Set equal to SE 13 Hi-Tag to activate. Size : If the Sprite is shrunk in the x direction, then the sprite will not be seen in the game, but the explosion will. FEMPIC1 : Sprite #1280 :The Fem Pics are used to activate the Respawn Sprite to spawn in any Sprite with a name in BUILD or EDITART. Lo-Tag : none. Hi-Tag : Set equal to Respawn Sprite to activate. APLAYER : Sprite #1405 :The APlayer Sprite is used to define where all multi-players will start in the map. You must have a minimum of 7 Sprites in the map for an 8 player multi-play game and a minimum of 7 Sprites in the map for an 8 player Coop game. Lo-Tag : 0 = Multi-player start position 1 = Coop-player start position PURPLE LAVA: Sprite #4240 Works like green slime with three exceptions: 1) Hyper Destructive 2) Will cause damage to player anywhere in sector (Can't fly over). 3) Can be placed on ceiling for same sector damage effect LIGHTNING BOLT : Sprite # 4890 LIGHTNING BOLT is used to spawn the flash position of lightning when used with Sector Effector #28. Lo-Tag: 0 Hi-Tag: Set equal to Sector Effector #28 Hi-Tag. Note: Any number of Lightning Bolts can be attached to any Sector Effector #28.