All Army Attack Demo During Steam Auto-Battler Fest, November 16-23

All Army Attack is a new chaotic large-scale roguelike auto-battler from Blacklight Games and Devolver Digital, and Devolver is putting an exclusive demo on Steam during the Auto-Battler Fest from November 16 to 23, 2026. The demo is the only way to play it right now: the Steam page lists a 2027 release and no price yet.

Devolver announced the game on November 10, describing it as a game where animals and plants unite against a cosmic threat, and pointing players straight at the Steam wishlist page. The video below is the publisher’s own announcement trailer.

The Steam page explains how it plays. You take the role of Commander, recruiting unique troops and artillery from a pool of cards, then build an army that scales into hundreds of units. Each card and unit can be customized, and individual soldiers can be modified or mutated, so two runs can end with very different armies. The battlefield calls are economic as much as tactical: sacrifice troops or preserve them to maximize your income from every fight, the store description says.

It is a single-player game with Steam Achievements, full controller support and family sharing, and Steam lists it for Windows. Its genres are Action, Casual and Strategy. It is on our release calendar now, with the wishlist live on Steam.

Compared with the 2027 release, the demo is a narrow window: eight days on Steam, and the store page sells its variety through card drafts, per-soldier mutation and units such as artillery drafted between battles. That is the part worth testing while the fest is open, because an auto-battler where you build the same army every run is just a menu. For players, the demo settles the question early. Wishlist the game, spend the fest week with it, and decide before 2027 whether it is your kind of auto-battler. Once it ships, we track Steam player counts for games like this on our player-counts page.

Edited by Kerwin Stewart, Editor-in-Chief · How we report