Portal is a puzzle-platformer franchise developed by Valve, which is set in the Half-Life universe. The series relies on solving puzzles with portals and has gained both critical and financial success.

Marl Kingdom or Marl's Kingdom s a series of Japanese RPGs developed by Nippon Ichi Software. The three main games in the series are Rhapsody: A Musical Adventure, Little Princess: Marl Ōkoku no Ningyō Hime 2, and Tenshi no Present: Marl Ōkoku Monogatari.

Devil May Cry is an Action Hack and Slash game with emphasis on flashy gameplay. Originally, development was started as Resident Evil 4 but after quite a bit of work, it became apparent that the game they had created was not a Resident Evil game. The gameplay was too fast, the main character was too powerful and the atmosphere not scary enough. The game was instead rebranded as Devil May Cry with a demo disk first released as bonus to those who bought Resident Evil: Code Veronica X.

Megami Tensei, commonly abbreviated as MegaTen, is a Japanese role-playing video game metaseries which was originally based on the novel series "Digital Devil Story" by Aya Nishitani. It has gone on to become one of the major franchises of the genre in its native country with the games published by Atlus with the exception of the Famicom/NES games, which were published by Namco.

Dept. Heaven is a franchise by Sting Entertainment containing a number of different episodes.  

The Pokémon, or Pocket Monsters, series began in Japan in March 21,1996 on the original Game Boy with Pokémon Red and Green, with versions Red and Blue arriving in North America on September 30th, 1998.