Complete Monster/Jak and Daxter


 * Baron Praxis in Jak II Renegade, who betrayed Damas, the real ruler of Haven City, and booted him out into the Wasteland and transformed Haven into a totalitarian empire, loaded with ridiculously cruel laws, a corrupt police force, and indifference to suffering and poverty in general. On top of that, he had no qualms using human lives in his Dark Eco experiments. And while he did go out of his way to give the REAL Big Bad of the game (see below) loads of Eco just to keep him and his creatures out of the city, despite the large shortage of it, it was obviously just to keep control of his empire and not because he cared about the people in it. His semi Redemption Equals Death makes up for very little of what he's done.
 * Metal Kor in Jak II. Not only was he the whole reason Jak's world got turned completely upside down, but he was also the reason the Precursors were driven to near-extinction. He held Haven City under his siege for decades, all just so that he could find and feed upon the last Precursor life force hidden within the Precursor Stone. And that isn't even counting the numerous atrocities he committed along the way to get it.
 * Count Veger in Jak 3. In fact, he's probably the real Big Bad of the entire series when you think about it. To start, he took Jak away from his father as a kid to try and harness his special eco channeling powers, which resulted in him getting left out on the streets of Haven. Later on, Veger destroyed the Palace of Haven just to gain access to the catacombs beneath the surface, killing hundreds of lives on the streets of Haven via the falling palace, and got Jak booted out into the Wasteland just to ensure he wouldn't get in his way. On top of that, he wanted to gain the powers of the Precursors just so that he could become the "light that destroys all shadows." He was trying to do a good deed, but was not only going about it the wrong way, but was also doing it for the completely wrong reasons. And worst of all,