Successfully complete and save the game. Load the cleared game file to begin with all skills. You can now select to be from Rome or Greece during character creation. You will also have the choice of having your character being a former gladiator, solider, or nobleman (which will change your starting stats). Also, you can choose Jupiter as your deity. All items in your item box will also appear when you reach the first actual arena.
While you are in the area where you can arm yourself, pick up as many items as possible (swords, shields, helmets). Once you are unable to pick up anything else, go to the storage box and store the items you have. Then, go back and pick up the rest of the items and store them. If one of the other Gladiators picks up an item, just follow him around; he will eventually drop it. After you have picked up all items and stored them, leave the area. Then, go to the armory where you can buy and sell armor. You now can access the storage box and sell all the free items. Make sure to save the weapons you want to fight with. The weapons and shields only reappear after each fight.
Successfully complete all story elements of the game (deal with Marcia, beat on Narcissus, and do the staged fight with Commodus). Then on Day 48, Marcia will tell you that Commodus wants you to train with him. You must first refuse. She will ask you again. Accept this time. In the carriage, Marcia will ask if you think it is time to liberate Rome. Select the "No" response. Kill Commodus when you fight him in his personal training ground. Narcissus will then be framed for killing him. When Laetus comes to ask you on Day 49 to be Narcissus's executioner, refuse to do it; decline both times when you are asked. Then on Day 50, do not leave your room and choose to "Sleep". You will then wake up on Day 51 and can continue to play. Note: The only way to "end" the game at this point is to go into Punishment mode, kill 100 guards, and escape.