*Unlock 1999 Mode Early
At the Main Title Screen, Prior to making any selections.
Up, Up, Down, Down, Left, Right, Left, Right, B, A
Progress approximately two hours through the game until you reach the Hall Of Heroes. When you see the large angel statue with "Hall Of Heroes" below it, go up the right stairs, and look to the right to see a Dollar Bill vending machine. Possess the machine, and take the money (Silver Eagle). Then, enter the Hall Of Heroes to make the Dollar Bill vending machine unpossessed. There will be a salt machine on the right, straight ahead. Obtain more salt, then leave the Hall Of Heroes. Go back to the Dollar Bill vending machine, and possess it again to get more money. Repeat this as many times as desired. Note: There are also a lot of vending machines around the entrance to Hall Of Heroes, allowing you to level up your magic and weapons.
After the battle with Slate in the Hall Of Heroes, when you are leaving the building, you will be able to travel down two skylines to encounter a group of enemies. Among the enemies is a Firefighter that will always drop a lockpick. Defeat him and collect the lockpick, then go back up the two skylines, and return to the Hall Of Heroes. Enter the door, then go back outside to find the Firefighter respawned in the same place. Defeat him again, collect the lockpick, and repeat the process as many times as desired. Additionally, there is a respawning lockpick on a wooden plank under the right hand stairs after the first skyline.