Ok, here is my quick guide to level changes:
Ok, you have your first level and second level right, now delete the trigger_changelevel and info_landmark! Put in a trigger_changelevel into the first level and set the landmark name to land1. Set the next map as what ever the next one is called! Now, here is the landmark bit. Put in a info_landmark inside the changelevel and name it land1. Now, thats your first bit done! Now, save the as what u want the first level to be called!
Now for the next level! With your first level saved and still opened in Hammer, delete the necassary amount of level so the second map doesnt have the rest of the first in. Just leave the changelevel and landmark where they are. Now, open the changelevel properties and set the next map to the name of the first map. After you have done this, just build the rest of the level and save this as whatever you want the second map to be called! Simple!
NOTE: You can substitute the landmark name for what ever you want!
Pheww, that was a long post! I really should start doing tutorials when I can think of a new idea! I go into enough detail! Hope this helped! It took me 10 minutes to write!
