An action role-playing game is a loosely-defined as the genre of games that are based on role-playing battle systems. These are games that you would easily get addicted to and love to play.
Image Source: http://encefalus.com
Here are two RPG games that are free and open source.
Egoboo is an open source, cross-platform game that is based on action RPG . It’s a three-dimensional dungeon crawling adventure that borrows a lot of elements from the roguelike genre. Though Egoboo is under development, it is fully playable.
2. Dink Smallwood
Dink Smallwood is a humorous adventure/RPG produced and published by Robinson Technologies in 1997.