The listing, Aritana and the Harpy's Feather [Steam Key] has ended.
Aritana is a platform game which the main aspect of its mechanics is the possibility of changing your stance. This stances define attributes such Speed, Jump Force, Attacks and Special Abilities. The player must choose between these stances to overcome obstacles and fight the Spirits of the Forest in a quick, intuitive and fun gameplay mechanic.
Aritana will learn new moves and abilities throughout the game and combo movements will help him fight the forest spirits. Meanwhile, Mapinguari will chase him constantly, forcing battles that require concentration and mastery of all skills learned.
More info: http://store.steampowered.com/app/314360/Aritana_and_the_Harpys_Feather/
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This game works on mac too! Also includes steam trading cards
Good Luck!