Often my job involves playing games before they come out. Sometimes, this means I’ll come away feeling like I’ve just played the next big thing. That’s one of the most exciting parts of my job, really, and it happened yesterday; I’m certain Big Walk is the next big thing.  Developed by Untitled Goose Game’s House House, Big Walk is a two- to 12-player co-op game in which you explore a huge island full of puzzles and secrets. Playing in first-person…