The Gate That Saved The World! [LitRPG - Isekai]

Of course this happened to me, because why wouldn't it?  I just had to take shortcut down a construction site.  I guess I'm a dungeon developer now, but what am I supposed to make? Hmm?  I can turn the dungeon into whatever I want as long as it is profitable? Well, this just got interesting. Join our Gate developer as he works his butt off evolving his gate's dungeon, evolving monsters, raking in the profits, and making the Hunters stronger all in preparation to face invaders not just from demons and devils from the Dark Realm, but also invaders from parallel realities. Who comes out on top falls entirely on our developer's shoulders and he doesn't even realise until the first invader arrives. His purpose is much bigger than it first appeared and his Gate is more mysterious than it at first seemed. Can he he truly live up to the responsibility placed on his shoulders? Can he prepare the world for catastrophies that even can not predict? Will his reality fall, or will he have to to step in and lend his aid, painting a target on his back in the process? Come find out in The Gate That Saved The World!