

If you look up the word Frog, detective, and prequel...well...you'd be reading a book and not playing this unofficial prequel to the Frog Detective games! So put down that book and pick up the gauntlet that has been thrown down at your feet, to solve a mystery like no other. Best played on an actual Game Boy (a pocket would be best!) Download the ROM at the bottom of the page and use an emulator like BGB, Sameboy or MGBA to play!

Puzzle / Adventure / Visual Novel / Mystery
Hero of Law is a crossover mod for The Legend of Zelda: Ocarina of Time that puts Link into the shoes of a defence attorney!

Point-and-click / Adventure / Educational / Mystery
Released in 1990 on Apple II, by St. John M. Morrison.

Platform / Adventure / Horror / Mystery
Mario goes on another quest to save the kingdom. What obstacles will he be facing this time? 'the (also known as Coronation Day) is a Horror themed Super Mario World ROM Hack released in January 2016. The hack features Mario in a forest like environment, with various messages coming from a strange, disembodied voice, but there's something more to it than that...

Adventure / Thriller / Mystery
The Witness was the seventh game released by interactive fiction pioneers Infocom. The player character is a detective who has been summoned to the Cabeza Plana, California office of Mr. Linder, a millionaire. Linder fears that his life is in danger... and indeed, as he sits in his office with the player, he is murdered before the player's eyes. The player then must solve the murder.

Role-playing (RPG) / Adventure / Indie / Action / Fantasy
Pokémon Unbound is a fan-made ROM hack of Pokémon FireRed that offers an enriched and modernized Pokémon experience. Set in the Borrius region—a land with a tumultuous history marked by a past war with the Kalos region—the game follows your journey to prevent the resurgence of a sealed dark force that once threatened the land.

Adventure / Visual Novel / Science fiction / Survival
Steins;Gate is a Japanese visual novel developed by 5pb. and Nitroplus. It is the second game in the Science Adventure series following Chaos;Head. The game is described by the development team as a "hypothetical science ADV" and explores time and time travel in 2010 Akihabara. The gameplay follows non-linear plot lines which offer branching scenarios with courses of interaction.