BTW, some of the sandbox features can be obtained by just enabling cheatmode and god mode (deleting the player) using console, right after starting the normal game. But as far as I see, it isn't fully equal to the sandbox mode - the first thing I saw is the absence of infinity items, even in the ...

Will add my 10 cents about land mines. After trying different approaches, I think that the mines are the best weapon since researched till the begemoths appear. For both defense and nest clearing.
With mines, you do not need anything else at all. In DW Marathon game, I still got best results with ...