Unsolved Case: Episode 4 f2p - Fatal Romance by Do Games Limited is a free Android game that falls under the puzzle subcategory. The game is the fourth installment of the "Unsolved Case" investigation game series. It follows a murder story where the player has to find hidden objects and investigate criminal case files to solve the puzzles. The game has a great storyline with a lot of secrets that will keep the player engaged.

The game has a dynamic plot that develops with detective investigation of criminal cases. Players have the ability to choose character phrases for an action on which the investigation depends. The choices made by the player influence the plot of the detective quest, solve the murder mystery, and see what comes of it all. The game also has achievements that players can earn by solving puzzles and finding objects in the unsolved hidden mystery games.

Overall, Unsolved Case: Episode 4 f2p - Fatal Romance is a great game for those who enjoy solving puzzles and investigating criminal cases. The game is free to play, but players have the option to buy hints if they feel stuck or don't want to solve a mini-game. The game is also part of a series, so players can move on to the next episode and find out what happens next.