Level Up Adventurer's Guide

From the kickstarter:

If you love 5E but would like a little more depth to the rules, Level Up is the new game for you!
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This 600-page hardcover contains the core rules of the game -- character creation, adventuring, equipment, combat, spells, and more.

In this standalone guide to Level Up, the advanced roleplaying game, you will find everything you need to play. Create diverse and unique heroes, engage in epic combat with villainous foes, and more!