In Free mode, select the Battle Of He Fei Castle as the Wu Forces on the Normal difficulty setting. Start by taking out the officers outside the first gates. One of them will drop a Life +20.

Next, kill Xu Huang for an Attack +8. Then, go around the right side, killing all officers, sub-generals, and anyone with a name. You should always get +4 power-ups. The officer on the horse will drop a weapon. Collect it, then go through the "security system".

You will eventually meet Cao Ren. Kill him for a +8 Defense, then go up and kill Xu Zhu for +8 Attack. At the left of this platform is a crate with a weapon box in it. Go through the gate and take the path to the left. The officer there has a +8 Defense. Then, cut across to the right and kill Sima Zhao for a +4 Defense. Next, take out Sima Yi for a +8 Defense.

Finally, complete the level by killing Cao Pi. This will max out the stats at the character selection screen, but only half-way at the action selection screen. You must use the level 20 amulets to max this out.

Also, this is not the best place to use a fresh character. Get a little boost by completing the Yellow Turban Rebellion level on the Easy difficulty setting a few times to get some weapons and some basic stat boosts.