i've been playing this recently, i dunno how it'd work if you cracked it because of the online features.
you need to use other players rope/ladders to access certain routes. other people also place down structures/bridges which you'll probably need (for convenience).
that's assuming it's cracked without online features though, so it could be cracked with (probably unlikely if it means accessing their servers tbh). great game tho, was told it'd be boring but i'm enjoying it so far