Complete the game to unlock all movies in the gallery.
Alternate suit colors
At the suit selection screen in tactics battle mode, highlight a suit, then hold L1 + L2 + X, R1 + R2 + X, or L2 + R2 + X to alternate the suit color.
Select tactics battle mode. Select the Federation or Zeon, choose any mission, highlight the original Gundam or Zaku II then hold L2 + L1 and press X (no panels); hold R2 + R1 and press X (real type or desert type); or hold L2 + R2 and press X (blue remake or different colors).
Choose either Federation or Zeon, then choose Mobile Suit GM or Gouf on Zeon side. Hold L1 + L2, R1 + R2, or R2 + L2 and press X to get either a dark color GM or Gouf custom.
Use the alternate costume on the Zaku2 and you will play as the original Red Comet.
Booster climb
In order to achieve maximum distance/altitude from your boosters, do not mash Booster. Instead, hit Booster at half second intervals to achieve great output from your boosters. Sometimes this can push you farther than your Thrusters (tap Forward, Forward).
Broken wall
Complete the game and Go to Tactics Battle mode. Select the first mission. Knock down a wall. Finish the mission. Select the mission again. The same wall will still be down.
Char's Zaku 2
Defeat Char's Z'Gok in hard mode in under 4 minutes.
Destroying of GAWs
When you see a GAW approaching, booster climb until you are above it. Land on it and blast it from on top. This will keep the GAW's guns from shooting you and the DOPPs.
Exam system
In tactics battle mode with the Blue Destiny GM to activate the Exam system, let your energy bar drop into the red. You can tell that the Exam system is activated when its camera (eye) turns from green to red. His will increase your defense and attack on enemy mobile suits.
Final level
During the final level of the game, select the mace-like weapon. The only enemies are mobile suits, and you can get past more enemies quickly by getting close, locking on, and consistently attacking. You also have the advantage of not having to reload.
Game magazine ads
Successfully complete the game and unlock the tactics battle mode. Go to the second mission and look at the billboards around the city. You will see "Tips and Tricks", "Official PlayStation Magazine", "Electronics Gaming Monthly", and PlayStation logos.
Garma's Zaku
When playing in story mode, mission 2, shoot down at least five of the Dopps that try to shoot down White Base. To make this easier, jump up on to White Base and shoot down the Dopps as they fly toward you. Once you have accomplished this, and the level progresses, instead of flying by in a red Dopp, Garma will be in his Zaku. Defeat him and successfully complete the rest of the mission to unlock this mobile suit in the gallery. If you have all the Zeon suits unlocked in the tactics battle mode already, then just finish a level to unlock this suit in the tactics battle mode. If not, just progress through tactics battle mode as usual.
Garma's Zaku II
To get Garma's Zaku II, you must destroy a certain number of Dopps in stage two, "Winds of War". When destroying Dopps, you will hear Amuro counting how many Dopps he has destroyed. When he gets to six, he will ask "Who's gonna be seven?" After the seventh Dopp is done, you are able to fight Garma in his Zaku II. You must destroy it before you fight Char. This is difficult, but if you get your timing correct you will be able to defeat him. Also, this must be done in Story mode, not Stage Select. Once your game has been auto-saved after stage two, return to the title screen. It is best to complete the game first to unlock Tactics mode. You must be at least a Major or higher in the Tactics Battle Mode Zeon.
Gundam Alex
In tactics battle mode, use every mobile suit to complete every mission. You will then be able to fight the Blue Destiny. After obtaining Blue Destiny, use it to complete every tactics battle mode mission. You will then get to fight against the Alex. Use the gun cannon against Alex, since it has the best armor. Use its Beam Cannon to defeat Alex. After defeating Alex you will be able to use it in the tactics battle mode missions.
In-game reset
Hold L1 + L2 + R1 + R2 + Select + Start at the map screen.
Kampfer
After getting the Federation suit Alex, play any of the Federation tactics battle missions with Alex then play any Zeon mission with any Zeon suit. Note: You may need a certain rank for this to work, it was tested at a Zeon Colonel level when using the Federation suits in tactics battle.
Level 1 tactics battle (Zeon): Easy "S" rank
Reach the base as fast as possible. Start from long distance, shooting the first three targets in the front. While avoiding enemy fire, use your boosters to get to the next three targets of the left side of the base. Once they are destroyed, use your boosters to jump the first hanger to your right. The Guntanks will not harm you. Watch out for GM, and use your claws, axe, etc. to hack away at the hanger until it explodes. This will take some time. Then, boost to the next hanger and repeat the process, still watching out for GM. Then, do the same to the last hanger. Once all hangers are gone, kill the target to the far right of the base. At this point, kill as many of the little tanks that do nothing. Killing them will ensure an "S" rank. Destroying about six of them should be sufficient. Then, kill the target to the far left.
To get an S+ rank with Zaku II, get to the left side of the base as fast as you can. This way, the GMs cannot get to you. Take out the four cannons on the left side (ignore the Guntank, it will not hurt you). Then, use the auxiliary attack (Cracker) on the hangers. Two Crackers should be enough to destroy a hanger. Destroy the last four cannons. This should take about two minutes to complete. Note: This can be done with anyone who uses the Cracker auxiliary attack.
Level 3 tactics battle (Earth): Easy completion
At the start, kill the first wave of Zaku 2 in front of you. Once you get the message about enemy reinforcements, go to the northern-most part of the level. Locate the mountain in the center of the area limit wall and stand on top of it. Wait for the carrier. When the message that states that it has arrived appears, make sure you are blocking. The carrier will fire at you. Just as it crosses the area limit, jump up and land on the carrier. Take out your Beam Sword and hack away at the cockpit area. For some Suits, it ends here. For others, you have to kill the last Mobile Suits.
Level 3: Destroying bombers
Get on the White Base's shelter, then jump on the bombers using boost and go to the tail fins. Pull out your sword and slice at it two times. The bomber's engines should turn red and it will begin to fall. jump off and repeat this on all the bombers.
Level 3: Easy completion
Before you start this mission, make sure you have the Beam Cannon equipped. On level 3, quickly defeat the green Zakus and leave the red one alone for the moment. Make sure you get them all before continuing. After you defeat all the green Zakus, jump on one of the tallest buildings you can find that is fairly close to the white base. Two bombers will approach very close to the buildings -- close enough so that you can jump from the building to the bomber. After jumping on the bomber, switch to your Beam Cannon and aim at the back stabilizer (the large fin on the back of the bomber) and hold Square for about two seconds. This will release a more powerful blast from the weapon.
Firing this blast two times at the back fin will destroy the plane and it will start to fall. Repeat this for the second bomber. Note: This requires practice.
Level 7: Easy completion
On this level (with the DOMs) chose the Beam Rifle. When you start, go behind the white base and kill the DOM there. An intermission sequence will begin. After that, you will have to go back to white base and jump on it. Switch to the Beam Rifle then target (not the Zoku II) and shoot them down. They will not shoot you as much on white base. Note: If one gets too close to white base, hack them with the Beam Saber.
Level 9: Defeating the Zock
Use the following trick to defeat the Zock faster in story mode. Keep your distance from the Zock until you can hide behind a rock. Make sure he cannot see you. When he gets close enough, pull out the beam saber and attack him. If you do not let up on your attack, the Zock will not get a chance to fight back. After a while, the Zock will be defeated with little or no damage done to you. Note: This requires practice and you may want to try to shoot him a few times with the beam rifle before you hide.
More Health In Stage 9
In stage 9 at the beggining pull back as far as you can towards the end of the radar facing where the enemies come out.Then let the two guncannons destroy all the enemies. About 95% of the time it works.
Recommended weapons
Level 1: Beam Sword
Level 2: Hyper Bazooka
Level 3: Hyper Hammer (fly on Goufs and hit their target spot.: It destroys them in one hit.)
Level 4: Beam Rifle, Hyper Bazooka
Level 5: Beam Rifle (you have no choice)
Level 6: Beam Rifle (same as Level 5)
Level 7: Beam Rifle (fighting in the forest) or Hyper Bazooka (fighting in open range)
Level 8: Beam Rifle
Level 9: Hyper Bazooka (for most ammo) or Hyper Hammer (for power)
Tactics battle mode
Complete story mode to unlock tactics battle mode at the main menu. It allows you to play as Earth Federation on the Principality of Zeon.