The beta test held January 12–23, 2026 has ended. The associated survey and reward event have also ended. Please check the official store for current availability.
Game information from the beta description:
● Build a skill combination
Develop your hero and combine active and passive skills to build your own deck.
● Fight alongside mercenaries
Collect and combine 30 mercenaries with different abilities. The beta description includes tanks, damage dealers and healers, whose placement can affect battles.
● PvP battles
Challenge other players' defensive units and rise in the PvP rankings. The beta description mentions rewards such as diamonds and daily ranking battles.
● Other battle modes
The beta description lists boss battles, a challenger mode with progressively stronger opponents, and a trial dungeon.
Official Korean community: https://cafe.naver.com/demonstrike
Source:
ONE store beta game description (checked November 6, 2026). Features may differ from the current service.