What's a fun Android game that combines merging units with train combat?

Train Attack: Merge War offers a unique blend of strategy and action. You start by merging units to create stronger fighters, then strategically place them on your train to defend against waves of enemies. The gameplay is easy to pick up, but the strategic depth keeps you engaged as you optimize your train's layout and unit combinations. As you progress, you'll unlock new units with unique abilities, allowing for even more customization and strategic options. The game provides a satisfying sense of progression as you upgrade your train and conquer increasingly challenging levels. It's a great choice for anyone who enjoys merging games with a twist of tower defense and train warfare.