Defeat Cao Pi within 5 minutes on Wu side of He Fei.
Chaos Difficulty
Clear Musou Mode with 1 character from Wu, Shu, Wei, and Other.
Diao Chan
Clear Musou Mode with 1 character from each Kingdom.
Dong Zhuo
Clear Musou Mode with Lu Bu.
Easy experience
Enter Free mode and select the Battle Of He Fei Castle scenario under the Chaos difficulty setting. Have player one choose a maxed Zhuge Liang. Have player two choose whoever you want to acquire weapons or level up. Have both players choose a fast horse with "Acquire Weapon" skill (for example, Auburn King for his "Steel Hoof" skill for charging into crowds). Zhuge Liang must be equipped with a 90+ weapon that has Ice element, Flash, True Musou, Air Wave and Mystic Seal. Having the Flash property is the most important as it will quickly cut down enemies. Begin the game. Have player two ride and jump into the pool of water below the belt trap where you cannot be harmed. Have player one charge towards Sun Quan's boats and ride onto the middle one (the boat just east of Sun Quan's). There is a Hua Tuo's Balm located in an urn at the southeast corner of the boat which will fill your Renbu and Musou gauges. Ride as close as you can to Sun Quan without getting knocked off your horse. Because you are using a maxed Zhuge Liang, make use of the special start tome to soften him up. As your fire special attack is going off, pad your damage using your power attack, which will also clear out enemy officers giving you more opportunity to open up on Sun Quan. Just as your special ends and Sun Quan is getting back on his feet, dismount and unleash your Musou attack on him. By this point he should be close to half HP if not less, and finishing him off is easy. If he jumps or dodges and is still standing after your Musou finishes, either bash him with your normal or power attacks or refill by attacking the crowd, who because of your fire special are nearly dead. All of this should require about one minute. All three objectives will be completed and you will get four weapons for each character, plus gain some levels for one who is not at the maximum. It is possible to do this with Zhuge Liang at lower levels, but it is important that if you do attempt it that you have the 90+ weapon mentioned as well as the following skills: Infinite Renbu, Flame, Hellfire, Stamina and Special Start.
Gan Ning
Clear Musou Mode with 1 Wu character.
Guan Ping
Succeed in 2 battle objectives on the Shu side of Fan Castle and finish battle with Guan Ping alive.
Hell Difficulty
Beat Wei, Wu, Shu, and Other musou mode.
Huang Zhong
Succeed in 1 battle objective on the Wei side of Ding Jun Mountain.
Liu Bei
Clear Musou Mode with 3 Shu characters.
Lu Bu
Clear Musou Mode with Liu Bei, Cao Cao, and Sun Jian.
Lu Meng
Succeed in 2 battle objectives on the Wei side of He Fei.
Ma Chao
Succeed in 2 battle objectives on the Wei side of Han Zhong Attack Defense Battle.
Master Difficulty
Beat any musou mode on Easy or Normal.
Movie player
Successfully complete Musou mode.
Pang Tong
Succeed in 3 battle objectives at Cheng Du battle and finish battle with Pang Tong alive.
Second Costume
An officer unlocks his/her second costume when reaching level 25.
Sun Jian
Clear Musou Mode with 3 Wu characters.
Unlockable Characters
Just sent how to unlock all of the characters that I know of, since you don't seem to have all of them. I just put them all rather than looked at the ones CheatingDome had.
Dong Zhuo Succeed in Battle Objective 1 on the Lu Bu side of The Battle of Hu Lao Gate
Ma Chao Succeed in battle objective 2 on the Wei side of Han Zhong Attack Defense Battle
Huang Zhong Succeed in 1 battle objective on the Wei side of Ding Jun Mountain
Wei Yan Succeed in 2 battle objectives on the Shu side of Wu Zhang Plains and finish battle with Wei Yan alive
Guan Ping Succeed in 2 battle objectives on the Shu side of Fan Castle and finish battle with Guan Ping alive
Pang Tong Succeed in 3 battle objectives at Cheng Du battle and finish battle with Pang Tong alive
Xiahou Yuan Succeed in 1 battle objective on the Shu side of Ding Jun Mountain
Xu Huang Succeed in 2 battle objectives on the Wei/Wu side of Fan Castle
Zhang He Succeed in 2 battle objectives on the Shu side of Han Zhong Attack Defense Battle
Cao Pi Defeat Cao Pi within 5 minutes on Sun Jian side of He Fei
Lu Meng Succeed in 2 battle objectives on the Wei side of He Fei
Zhou Tai Succeed in 3 battle objectives on the Shu side of Yi Ling
Lu Bu Clear Musou Mode with Liu Bei, Cao Cao, and Sun Jian
Diao Chan Clear Musou Mode with 1 character from each Kingdom
Sun Jian Clear Musou Mode with 3 Wu characters
Cao Cao Clear Musou Mode with 3 Wei characters
Gan Ning Clear Musou Mode with 1 Wu character
Zhang Liao Clear Musou Mode with 1 Wei character
Liu Bei Clear Musou Mode with 3 Shu characters
Zhuge Liang Clear Musou Mode with 1 Shu character
Yuan Shao Complete all 3 targets and capture Wu Chao before completing the stage on the Wei side
Xu Zhu In He Fei on the Wu side, personally kill Cao Ren and Xu Zhu
Taishi Ci Defeat him in the Battle for Wu Territory
Xiao Qiao Succeed in Battle Objective 3 on the Wu side of the Battle of Shi Ting
Ling Tong Succeed in Battle Objective 1 on the Wei side of the Battle of Shi Ting
Yue Ying Succeed in Battle Objective 1 on the Wei side of the Battle of Wu Zhang Plains
Sun Ce Succeed in Battle Objective 1 on the Sun Jian side of the Battle of Xia Pi
Cao Ren Succeed in Battle Objective 2 on the Lu Bu side of Fan Castle
Sun Quan Succeed in Battle Objective 1 on the Lu Bu side of The Battle of Chi Bi
Huang Gai Succeed in Battle Objective 3 on the Wu side of The Battle of Chi Bi
Zhang Jiao Beat stage with completing all three targets in the Yellow
Turban Rebellion. Playable in only Free Mode and Challenge Mode
Zhen Ji Xu Du Invasion Battle, Lu Bu Scenario, succeed Battle Objective 1.
Unlocking Yuan Shao easily
Play the Battle Of Guan Du scenario as the Cao Cao force. Yan Jin and Bai Ma must not fall. You will need a strong character that can defeat enemies quickly. Make sure to have Renbu Bag, a long Musou gauge, and a fast warhorse. The enemy officers will try to siege Bai Ma and Yan Jin at the same time. Move between them as fast as possible to aid the guards. If either falls at any time during the battle the target is a failure. Keep the enemy back and defeat Yuan Shao as quickly as possible.
Very Hard Difficulty
Clear Musou Mode with any 1 character.
Voice Gallery
Raise up any character's experience to LV. 50. A Voice Gallery will be unlocked for that character in the Camp.
Wei Yan
Succeed in 2 battle objectives on the Shu side of WuZhang Plains and finish battle with Wei Yan alive.
Xiahou Yuan
Succeed in 1 battle objective on the Shu side of Ding Jun Mountain.
Xu Huang
Succeed in 2 battle objectives on the Wei/Wu side of Fan Castle.
Zhang Liao
Clear Musou Mode with 1 Wei character.
Zheng He
Succeed in 2 battle objectives on the Shu side of Han Zhong Attack Defense Battle.
Zhou Tai
Succeed in 3 battle objectives on the Shu side of Yi Ling.