While playing the game, hold L + R + Y + A + B + X and press White. Your current character will now be at level 10, with 45 feat points and 500,000 gold.
Get next to a save point. Save your game. Drop the items you wish to duplicate. Reload your character. Pick up the dropped items. Repeat this as may times as desired. You will have the number of items you had when you saved plus the ones that you picked up after reloading.
This trick requires at least two characters. First, save the game. Then, have one character drops all their items. Next, have the other character pick up all the items, sell them, then buy whatever desired. You can then reload the character that dropped all their items. Note: In two player games, gold is shared; if you reload the character after selling all the items it will reset the gold to the saved amount. If playing in single player mode, start a second game and save it. Then load the saved game you want to duplicate in. Import the saved character from the other game into the game you are playing and save. Then, repeat the process. When done, export the second character and continue your game. Note: This works well for the workshop. Before selling duplicate items, check to see if they have gems. You can break them out to have gems to work with that are not for sale at first. Also, buy weapons that have gems and break them for extra gems.
If you have items that you want to duplicate, go to a battle area with a save location then save the game. Drop the items to be duplicated on the ground. Then, select "Load Character" and reload your character from the same save. Pick up the item and you should now have two of them. You can use this to make a lot of money by duplicating gems and runes. Sell them, then duplicate them again and repeat. Then make a big item, such as armor with sixteen runes, sixteen gem slot one, and sixteen gem slot two. Upgrade the item, duplicate, then sell it.
This trick works with all characters who are able to buy experience from their NPC associate, such as the cleric and the church of Helm and necromancer with the Oglulkluer person. Make a lot of gold (use the duplicate item trick if desired). Save the game. If you already used up your NPC experience you will need to start a new game. However, if you have not, save. Spend all your money on experience. Save a new saved game. Load your old saved game before you spent your money on experience. Load your character from the saved game after you spent the money. Spend more money on experience and repeat as many times as desired.
Along with the item duplication trick, you can make your character as powerful as desired. Before you have spoken to the person who gives you experience for talking to them (for example, when playing as Ysuran it is Omduil), duplicate items to get a lot of gold. Then, save your game in two slots. Speak to him as many times as you can to gain experience, then save on one of the slots. Exit to the menu, then load the duplicated original from before you bought the experience. With that loaded, import your character from the newer file. You will have the experience, but you can buy it all over again. Always save to the newer file, load the older game, then import the newer character.
In some situations, your character may be awarded a prize of 1,000 gold and 1,000 experience points. However, before you claim a prize, save the game and get your award. Load a previously saved game before you get your gold and experience points. Then, load the character that already has the gold and experience points. Keep repeating this processes to get a lot of gold and experience points.
Each character has their own person to talk to (except Dorn). Most of the time, these contacts ask for money. When you get a chance, pay them the amount of money they ask for. In Act 3, the character's contact will ask them to do one final mission. Do so and your character will earn a new rank that makes them even more powerful. Dorn also gets this, but not until Act 3.
Unlock extreme mode, then start a new game in any other mode (for example, easy) with Drizzt for player one. Give him as many weapons, armor, etc. that he can carry then save the game. Then, select extreme mode and choose anyone. Bring him into the game as player one. He will have all the weapons that were given him or her.
When battling the Green Slimes in the Sewers, use weapons that have large damage attacks, such as swords and maces. When attacking the slimes, hang around the edge of a corner and let them come to you. Then, ambush them when they are close enough to your character. This is the best way to battle in the Sewers, and it saves your health potions.
To defeating the Wayfare Inn Boss, make sure you have a ranged weapon. First, take out the underlings. Do not hit the Boss; he will not attack you until you attack him. Once all the Goblin underlings are dead, you can attack Harnak. When he starts to chase you, run towards the tables on the right. Jump to get over them. Once on the top side of the tables, line up on the corner closest to the fireplace. This should get Harnak stuck by the bottom table, leaving you free to hit him with your ranged weapon.
When fighting in Luvia's Laboratory and you get to the end where she sends two beasts to attack you, only go forward slightly. One of the beasts will chase you. Stay in the bottom portion of the room and use the crossbow on it. This is easier with two players. Eventually it will die and then you can defeat the second one in any way desired.
When entering the Elemental Planes think of where your going and prepare yourself as follows. Buy at least 200 health potions. These areas are not easy and you will die very fast if you do not have enough of them:
Elemental Air: Use your normal equipped weapons and armor for this area. Also save all the way through it.
Elemental Earth: For this area, you will need to buy leather armor and wooden clubs with a damage of 5-8. This is due to the many of Rust Monsters on this plane. After you get to the entrance of the Earth Foundation, put your regular armor and weapons back on and tear the Boss apart. Go after the bowmen first or you will not survive.
Elemental Water: Use regular equipment. Nothing special is required for this plane. Make sure you save the game before you go into the foundation.
Elemental Fire: For this plane, if you feel bold and want to have some fun, upgrade weapons with the Aquamarine stone for the freezing ability.
When you reach the point where you have to fight Trolls at Skull Gorge, upgrade your weapons. The best way to do so is to have two maces that can be upgraded. When you upgrade, use these stones for the weapons. With these weapons in hand as you enter Skull Gorge, you should have no problem defeating the Trolls that are waiting there.
Fine Lite Mace: 1 Rune Stone 1 Jancinth and 1 Jade. Combine all these on this one mace and you will have a Mace that will have the Fire and Acid ability and also have a +1 rating as well (Acid damage +1-4 and Fire damage is +1-8).