• Jak does not start off with a goatee. You have to turn on the toggle cheat to give him a goatee.
• The circle button is the only select button for the menu when the Japanese or Korean languages are chosen in settings. For all other languages both x and circle will work.
• You cannot kill civilians. Hitting/shooting them twice will still trigger the wanted level, but they will never actually die. This remains the case during overworld missions such as the Erol race as well. You can still blow up vehicles and consequently their drivers, however.
• Despite the second paragraph on the game case saying otherwise, turning into Dark Jak does not hurt you and leave you on 1 HP (image of case, text not easily readable: 
)
• Currently there do not appear to be any glitches that have been patched (entire any% route works as of April 4, 2015)
• No time advantages or disadvantages have been found thus far
Game title in Japanese: ジャック×ダクスター２ (Jak x Daxter 2)
Release date: March 11, 2004
English text on case exactly as it is written:
In Desperate days,
Heroes are chosen. Not for their Courage, since fear haunts us all. Not for their Skill, as the path to glory lies littered with the capable fallen. Not for their Luck, for any fool can win or lose to the fickle of fortune. Heroes are chosen by fate, and fate alone. And within this fragile choice great hopes and dreams reside. One Hero to shoulder our darkest burdens, and lead us all to a bright new world.
Having been injected with Dark Eco during experiments in prison, Jak's body has begun to change. Now whenever Jak is exposed to small amounts of Dark Eco, his rage begins to build. If Jak reaches a certain rage threshold, he can choose to transform into Dark Jak, and wreak havoc for a short time. This 'mode' is terribly exhausting, and Jak always comes out of it damaged, with only one hit point left, so he must learn to use it wisely. Unwanted Power he acquired it is. He is not what he was. Vastly huge adventure awaits him, truth is about to be unveiled. What he will find is a link which transcend the time yet never wear off.
Video of title screen and intro cutscene:
Video of citizen invincibility:
