From publisher blurb:
Dungeon Snap is a series of short adventures that can be played completely out of the box. Featuring pre-created characters for Dungeons & Dragons 5th Edition, or any OSR system.
But even more, Dungeon Snap includes its own system which is super simple, just two pages of rules, and at the same time it's very familiar to the games you already know. And yes, each volume of Dungeon Snap also includes pre-made characters for this system as well.
Each volume of Dungeon Snap includes three short adventures that can be played in one or two sessions. All new monsters in the adventure come with their 5th edition stat blocks in an appendix.
But it also includes an appendix with the stats of monsters in the OSR system (similar to those of the Advanced version of the most popular role-playing game in the world in the 80s and 90s), which are compatible with almost any OSR system, including Dungeon Snap's own system.
Adventures in this volume:
A Golden Problem. A short adventure in which the characters must rescue a literally golden child from the dungeon of a dragon obsessed with gold.
The Beast of Vaudan Town. The story of how a bunch of villagers become adventurers. Most of this adventure is randomly generated, so you come up with a different adventure every time.
Prison under the Lake. A short adventure in which the characters will have to navigate to the center of a lake and face monsters in an ancient underwater prison.