If you're not familiar with DnD, it's a tabletop role-playing game where adventurers (the players) make their way through a campaign (a series of interactions, battles, and investigations) to achieve some specific objective (rescue the princess, retrieve the ancient artifact, defeat the dragon). There are pre-published campaigns, but I've decided to write my own (also known as a homebrew campaign). Nobody tell my partner, because he's one of my players, but they're going to get sucked into a pyramid scheme that's trying to bring about a dragon attack. It's good stuff.
|A little something like this|
If you want to try game writing, or writing for branching storylines, there are a few good resources to check out. One is Twine, which is a free open-source tool for telling interactive, nonlinear stories. You can download it or use it online. It's pretty easy to use, and I actually had to use it for my game writing applications. Choose Your Story is a good place to get feedback on your work. And of course, you can always ask for feedback on Twitter, Reddit, and other writing communities (including this one!). So go forth and be adventurous :)