"Uh...Frisk? I think buying Subnautica free from the Deep Web is more effort than buying it with money off of Steam."--Undyne
Welcome to the Game: Subnautica / / Undertale is the sequel to Welcome to the Game and Undertale, developed by Landfall Games.
The story begins with Frisk and Undyne buying a free version of Subnautica off of the Deep Web.
It's normal Subnautica gameplay, but with hacking scenes as such from Welcome to the Game.