Finally, in the third game, you are imbued with Light Eco, which balances the Dark Eco within Jak.
In the second game, Jak is infused with Dark Eco, which changes the tone of the game but makes Jak much more powerful. As Jak, you control a substance called Eco, which in the first game gives the player enhanced abilities and more powerful attacks. The Precursor Legacy kicks off the series as a pure platformer, but through Jak II and 3, the series evolves into a third-person action platformer, complete with weapons and vehicles. The resulting banter and snarky dialogue between the characters is part of the inherent charm of the series.
He is almost always accompanied by his best friend Daxter, who is turned into an Ottsel (a fictional hybrid of an otter and weasel) in the first game. Throughout the trilogy you take on the role of Jak, a hero who goes through many changes over the course of the games.
