Merge Master: Monster Run 3D is a free app that is supported by ads. It is a running game for mobile devices in which the player must guide a collection of sausage monsters to the end of a series of levels, watch containing different obstacles, and complete other challenges.

The style of the game is very similar to games like Weapon Evolution. Players can increase or decrease the number of monsters they have by running through certain gates. These gates typically have mathematical modifiers on them, such as "+5" or "-20", relating to the number of monsters the player has.

Lead sausage monsters to the finish line

The levels of Merge Master: Monster Run 3D are straight paths that the player's collection of monsters constantly runs along. The player cannot stop them but instead must guide them left and right to avoid hitting things they don't want to hit. The level contains obstacles, hostile entities, and gates that modify the number of monsters.

Build an army

Before the running stage of the game starts, the player must build their sausage monster army. They do this using a simple color-matching game that involves dragging the player's finger around the screen to group up monsters. This stage determines how many monsters the player starts with, and that number can grow or shrink during the level of gameplay.

A fun running game that's not particularly unique

Merge Master: Monster Run 3D is a fun runner game that has some progression in the form of more challenging monsters. However, it doesn't do much to set itself apart from other games in the genre.