Adjust Annex Options Unlock=(recruit) 100 officers

Adjust Officer Unlock 50 Policy Cards

Adjust Time LimitClear Empire Mode
Change fief owner and default officers Clear Empire Mode
Officer Death Options Unlock 50 weapons

Here's a Tip to unlock fourth weapons:

Use the smith to upgrade your character's weapon to level 4. Then, successfully complete any battle with 500 or more kills. At the end of the battle, you will receive that character's fourth weapon.

All you have to do is clear any regional scenarios.

Clear through the 1560 Kawanakajima Scenario.

Beat the 1582 Honnouji Scenario.

Get the 4th weapons & 1000 KOs medals for all of the unique characters>

In addition to the differenthistorical scenarios, you can also unlock options to change the feel of the game. Time limit on gives you until the year 1600 and off gives you until winter of 2000. Annex options change how you can take territory from the enemy. Once unlocked, changing fief owners can be done by pressing select over the fief.

Finish Empire Mode to unlock the option for a time limit.