Gameplay is similar to other games in the Jak series, though there are also some flight segments. There is no Dark or Light Jak available in this game, due to the unstable eco. Some segments require using Jak's eco powers for superhuman tasks, such as rocketing up great heights and building structures to cross large gaps. At a point early in the game, Daxter gets covered in Dark Eco and becomes Dark Daxter. Much like another Jak and Daxter game, the player has four guns in the different eco colors (including red, green, blue, and yellow, but excluding Dark eco). A new addition to the series is that the player can now choose to play the storyline missions or do optional "missions" such as hunting for precursor orbs and weapon upgrades.
Fonte: http://en.wikipedia.org/wiki/Jak_and_Daxter_The_Lost_Frontier