A single player style map and a multiplayer map is different in modern style maps. If you plan to make maps incorporating both styles, all locked pathways should to be operable for mulitplayer, at all time.
- Step 1. Construct the locked path.
- Step 2. Add an additional switch and set the color palette to 1. The switch is then only visible in Multiplayer.
- Step 3. Match the lowtag of the switch to the lowtag of the element1 controlling the locking mechanism2.
To see how it is done, simply open any original Duke 3D map.