Phantasy Star II/Green Dam

The Final Dam
The most difficult dam is the Green Dam. This is the one located on the north side, closest to Paseo. You can teleport to Paseo, walk out and head north to the coast where your Jet Scooter is parked, and hop on. Then immediately drive down the canal to the Green Dam entrance.

Green Dam
The Green Dam only consists of two floors. Unfortunately, they are two of the widest, most complicated floors that you'll find in the whole game. Getting to your destination isn't that hard, it's figuring out the right paths to take that will lead you there that's difficult. There are a handful of items in here to collect. Most are worth going out of your way for, although one is fairly common. Similar to the Blue Dam, one comprehensive walkthrough is presented below that will take you back and forth between the floors and guide you through collecting the valuable items.

Floor 2



 * 1) F1 - Upon entering the Green Dam, use the Green Card to open the door, and access the chute to the second floor beyond.
 * 2) F2 - Walk a short distance up, and then to the left through the opening between the blue panels, and take the next chute down.
 * 3) F1 - Walk straight to the left to the next chute back up.
 * 4) F2 - Immediately to your right should be a chest which contains the Truth Sleeves, good defensive gear for Shir.  However, like the Amber Robe and Crescegear, this item can heal 60 HP of damage when used in battle.  Give this item to someone who does not yet hold a healing item.  Then walk up as far as you can to the wall above, and walk left until you reach the next down chute.
 * 5) F1 - Walk to the left to find the next up chute.
 * 6) F2 - (Optional) If you wish to collect the Telepipe, an item you can easily buy in stores, you need to head down and to the left.  There are two down chutes that will both lead you to where the Telepipe is, but the lower chute is closer.  Head down to the first floor, and make your way to the middle of the right side to collect the Telepipe, and then return to the second floor.
 * 7) F2 - From where you arrived, there is an opening in the upper wall that leads to a path along the top of the second floor of the dam.  Note that if you step off into the black, you won't fall to the first floor, you'll leave the dam entirely.  Follow this path along nearly the entire length of the Dam until you can pass through an opening into the right portion of the dam.  A little further to the right is a chute that leads down.  Use it.
 * 8) F1 - Wind your way up and around to reach the bottom of this section of the first floor to find another chest.  Inside, you'll find the Aegis, a decent shield for Hugh or Kain.  However, this is the fourth piece of gear that can heal damage when used in battle.  Coupled with the Amber Robe, Crescegear, and Truth Sleeves, you should now have four pieces of equipment to hand to every member in your party so they can heal their own wounds if necessary.  Then return to the previous chute and back up to the second floor.
 * 9) F2 - Head left as you pass the opening in the wall that you came through, and work your way down and around until you reach the treasure chest tucked away inside the wall.  Inside, you'll find the Green Sleeve, which is a good defensive item for Anna, but it comes at the cost of using both hands for Slashers which might be too much of a sacrifice.  It also has the ability to cast a spell when used in battle, Shinb, but that spell is of questionable use since it rarely succeeds in chasing an enemy away due to a bug in the programming of the game.
 * 10) F2 - After you collect the item, return to the bottom part of the floor and head to the left.  There are two down chutes in close proximity to one another.
 * 11) F2 - (Optional) If you wish to collect a Star Mist (and it's generally recommended that you do) take the closer of the two chutes down to the first floor.  Then cross the room to the top to find the chest with the Star Mist in it.  Then return to the bottom and back up to the second floor.
 * 12) F2 - Take the further of the two chutes, the one closest to the corner, and head down to the first floor.
 * 13) F1 - Walk to the left to find the next chute back up.
 * 14) F2 - You have now arrived in the location of the control panel.  Head left to reach the panel, use your Green Card on it, and unlock the final dam.

Successfully opening the last dam will trigger an event. Three enemies known as Army Eyes will suddenly attack you. Try as you might, you will be unable to defeat these enemies. By the fourth round, they will trap you in Plasma Rings, and whisked away to a penitentiary in outer space.