Star Wars Knights of the Old Republic II: The Sith Lords

• The first companion you get is a rogue guy, even if you don't take him with you on missions do not neglect his equipment. At one point you'll have to go off on your own without party members, and he'll end up in a fight, if he isn't well set up you might end up stuck and unable to continue.

• If you go full light side or full dark side, you'll get a stat bonus, you get nothing for staying grey

• Prestige classes are unlocked halfway through the game based on your alignment, staying grey means you won't unlock them

• You can break down equipment and stuff for parts to craft things, but at the game's start it's not worth it. Save junk for when you have a character with high repair in order to maximize what you get.

• When you get to choose between the planets to go to, don't do Nar Shadaa first, it's probably the hardest.

• Raising influence with your companions is very useful in this game, you can turn a bunch of them into Jedi if they like you enough.

• Some party members you can gain influence by talking on your ship, but there's a couple (an engineer and a robotic ball), that really only get conversations while out there solving quests. If you want their backstory, you need to have them with you.

• You can now influence your companions with certain dialogue options during the course of gameplay. Positively influencing your companions opens up dialogue trees which explains more of their backstory, as well as a bunch of other rewards besides simple experience points or items.

• On that same note, make sure you talk to all of your companions often. It is worth it.

• You can now use mines to automatically force open doors and containers if you don't want to bash them for two minutes, at the risk of destroying some of the objects in a container, and with no penalty for doors, other then the fact that you'll lose a mine.

• Regarding the classes you can choose at the beginning of the game - when they level up, Guardians tend to get more feats (fighting abilities, etc), Consulars tend to get more force powers, and Sentinels strike a balance between the two.

• If you want to see as much of the game as possible in one playthrough, your best bet is the Sentinel. With that class, you get a ton of base class skills so you can interact with a lot of NPC's and objects, and you're not tied down to either melee weapons or the force like Guardians or Consulars are, respectively.

• Make sure you search every Assassin droid you kill. Their remains usually contain specific components used for getting a certain companion.

• Try not to get into a habit of relying on one or two companions for the entire game. Each character has something they can bring to the party, and I usually try to diversify my party when I play. Just because a companion can't use the force, doesn't mean they are useless.

• Expanding on the last point, even if there are party members that you tend not to use, make sure that you do at least keep their equipment and stats up to date, as there are some instances in the game where certain party members will be left on their own without any backup, and be expected to handle whatever challenges the game throws at them.

• Not sure if this is true for everyone, but I found that it's really difficult to make a bad character. Invest in skills, feats, and powers that you think would be useful or fun, and you should be fine.

• Obsidian fleshed out the crafting mechanic for KotoR 2, so if you don't think you'll need an item, you can break it down into components and chemicals instead of just selling it, and make items and upgrades out of said components and chemicals. Use this and use it often, you can make some seriously great items with clever uses of the crafting system, and it's not too difficult to get the hang of.

• Always try to have someone who is good with ranged weapons in your current party. While it's tempting to have a party full of lightsaber-wielding Jedi, it's super handy to have a guy who can stay back and provide covering fire or throw grenades.

• Regarding your lightsaber, you'll find the components to build one on whichever planet you decide to visit first, so don't worry about missing out on it.

• To add to this: get the Restored content mod. more quests, and more importantly: a more complete story. Things actually get resolved. You feel satisfied. Dont blame obsidian, blame the now defunct lucas arts.