Merge Defense by Yizhiyuan Network Technology Co., Ltd.

Merge numbered tiles on a grid to build stronger defenses against waves of advancing enemies. Players combine matching units strategically to unlock more powerful guardians while managing limited space and timing. The game challenges players to optimize merges under pressure in a tower defense-inspired puzzle setting where progression depends on evolving unit strength. Key Features • Tile merge upgrade mechanic • Grid-based strategic placement • Increasing enemy wave difficulty • Timed merge combo challenges • Defense tower puzzle theme