Underkeep Play Demo

Underkeep Bosses (2026)

The store page says optional bosses exist and does not print a roster. Two Steam screenshots label fights “Skeleton King” and “Boneblade”. No written post says which label is a boss. A search for the word mostly returns the Final Fantasy XIV dungeon, a different work.

Turn-based fight against a skeleton, with damage numbers and a combat log
Image: Rake in Grass / Steam. Checked 5 Nov 2026.
Skeleton King fight in a stone hall, with a Storm Chain tooltip and party portraits
Image: Rake in Grass / Steam. Checked 5 Nov 2026.
Rows that belong to other games are listed so you can leave, not so you can fight them here.
Name people searchBelongs toIn this 2026 game?
Optional bosses (no names)Store description of the 2026 crawlerPromised. Names not published
Skeleton KingName on a Steam screenshot health bar1 source · picture label. Role not stated in text
BonebladeName on a Steam screenshot health bar1 source · picture label. Role not stated in text
GargantFFXIV, The Underkeep, patch 7.2No
Soldier S0FFXIV, The UnderkeepNo
Valia PiraFFXIV, The UnderkeepNo

Why the table is almost empty

I read the studio’s announcement list through 3 November 2026 and the 4 November review. The review mentions skeleton enemies and optional bosses as a category. It does not hand out a proper name, a floor, a weakness, or a drop. Steam screenshots put Skeleton King and Boneblade on health bars. Calling either a chapter boss would upgrade a picture label into a strategy.

The other dungeon

Final Fantasy XIV’s The Underkeep is a level 100, four-player duty from patch 7.2. Its encounters include Gargant, Soldier S0, and the Indefatigable Defense: Valia Pira. Those fights have their own wiki. Copying their mechanics onto this page would answer the wrong question for anyone who bought the Rake in Grass game. If that duty is what you needed, the which-Underkeep page points at the FFXIV wiki and stops.

When two independent sources name the same 2026 encounter, this table grows a row with a link to a detail page. A single streamer’s nickname for a fight will not be enough.

Questions

Who are the Underkeep bosses?

No written roster exists. Steam screenshots label Skeleton King and Boneblade. Neither post calls those labels bosses.

Is Gargant in this game?

No. Gargant is a boss in the FFXIV duty called The Underkeep.

Is the Boneblade a boss?

The image shows a skeleton enemy with that name in the log. No source calls it a boss.

Sources