isometric game - any info is welcome

H! people,

I'm want make a very easy/basic isometric game.
That's why I post this topic to get more info about isometric games.

And the forum search engine is temporarily disabled :(

Does someone have some .bb example files or yust some info about the isometric system ?

I can't find any examples made in blitz3d yet, and blitzcoder.com is dead.

Thanks very much,

edit
for example how to do height's like people walking over hills ?