First, there is the Splice & Dice expansion, which requires either the Too Many Bones base game or Too Many Bones: Undertow to play. Splice & Dice introduces a new Build-a-Tyrant option allowing players to customize their own big bad or develop the campaign boss over the course of the adventure based on the type of baddies defeated in encounters and the order in which they are defeated. This exponentially increases the variability of potential Tyrants. Splice & Dice also includes new pre-built Tyrants and hybrid Baddies that count as multiple enemy types.
Second, the campaign offers new content add-ons. Two new Gearlocs are available as playable characters. Dart, who rides a pigadillo, and has a double-sided playmat that can be flipped during battle to change her from a ranged attacker to a melee attacker, as well as changing how her skill dice operate (prototype playthrough video here). The other new Gearloc add-on is the Gearloc Council Internship Program, which is actually four mini-Gearloc mats that operate together. The final new content add-on is the Too Many Bones Trove Chest, which is a giant box with a future-focused design to hold all Too Many Bones content in one Kallax-friendly container, as well as providing new storage solutions for Gearlocs, loot, encounters, and Baddies.
Third, the campaign provides access to a full reprint of all previously published Too Many Bones products. The campaign closes June 14th and anticipates new content delivery in December 2019.