Changes

'''Security Hall''' is the 8th stage in the Dark story on [[Sonic Adventure 2]].  Rouge is used to play this stage.

'''Security Hall''' is the 8th stage in the Dark story on [[Sonic Adventure 2]].  Rouge is used to play this stage.

This is a treasure-hunting stage.  The general [[SA2 Hunting Tips|hunting tips]] apply.  The best locations are:

This is a treasure-hunting stage.  The general [[SA2 Hunting Tips|hunting tips]] apply.  The best locations are:

Emerald 3: "In the air" Turn 45 degrees right at the start, and hop the rail. If you see the blue emerald hovering over the C block air conditioner, good for you. Glide up and grab it. If not, restart.

Emerald 3: "In the air" Turn 45 degrees right at the start, and hop the rail. If you see the blue emerald hovering over the C block air conditioner, good for you. Glide up and grab it. If not, restart.

Emerald 2: "Everyone has seen it at least once before" This refers to the enemy directly ahead. Note the radar for this one. If it starts green, but turns yellow while you're falling and before you can move forward, don't bother trying this one, just die. Otherwise, run ahead and kick through the enemy and you just might come up with the purple emerald.

Emerald 2: "Everyone has seen it at least once before" This refers to the enemy directly ahead. Note the radar for this one. If it starts green, but turns yellow while you're falling and before you can move forward, don't bother trying this one, just die. Otherwise, run ahead and kick through the enemy and you just might come up with the purple emerald.

Emerald 1: "Everyone has seen it at least once before" The reason why you want to reject a green-to-yellow starting radar for emerald 2 is because the same enemy can hold either of 2 emeralds! If you got it when the radar was a giveaway, then you would end up getting the emeralds in 3-1-2 order which means you would never see the good spots for emerald 2. Anyway, the location for this one is the same as before, except this time you want the radar to start out green and turn yellow before landing.

Emerald 1: "Everyone has seen it at least once before" The reason why you want to reject a green-to-yellow starting radar for emerald 2 is because the same enemy can hold either of 2 emeralds! If you got it when the radar was a giveaway, then you would end up getting the emeralds in 3-1-2 order which means you would never see the good spots for emerald 2. Anyway, the location for this one is the same as before, except this time you want the radar to start out green and turn yellow before landing.

Record video: [http://soniccenter.org/videos/2-4-24-1-579.wmv 0:05.79 by SadisticMystic]

Record video: [http://soniccenter.org/videos/2-4-24-1-579.wmv 0:05.79 by SadisticMystic]

The fastest approach in this level is to get all three emeralds separately.  As this is Hard mode, they can normally be done in any order, but due to a quirk in the way the red emerald is collected on a speedrun, collecting it last leads to a glitch that either adds pointless seconds to your time or can be abused in a way that's banned from competition and that can save a false time as low as 0.02 seconds.

The fastest approach in this level is to get all three emeralds separately.  As this is Hard mode, they can normally be done in any order, but due to a quirk in the way the red emerald is collected on a speedrun, collecting it last leads to a glitch that either adds pointless seconds to your time or can be abused in a way that's banned from competition and that can save a false time as low as 0.02 seconds.

Emerald 1: This is 45 degrees to your right, similar to the ideal emerald 3 in mission 1.  However, it's further back and thus takes more time to get (3.50 seconds is the fastest known time for a straight run to the emerald).  A trick unique to Security Hall can be used to shave off time.  Rather than going all the way to the far-right corner and diving, do a dive into the near-right corner and press right so that the fan's upward boost is blocked by the floor.  This will lead to your death as you fall back down (or, better yet, dive down).  Now why would you want to do that?<br>

Emerald 1: This is 45 degrees to your right, similar to the ideal emerald 3 in mission 1.  However, it's further back and thus takes more time to get (3.50 seconds is the fastest known time for a straight run to the emerald).  A trick unique to Security Hall can be used to shave off time.  Rather than going all the way to the far-right corner and diving, do a dive into the near-right corner and press right so that the fan's upward boost is blocked by the floor.  This will lead to your death as you fall back down (or, better yet, dive down).  Now why would you want to do that?<br>

Remember that when you die by getting hit, you enter an uncontrollable death animation.  But when you die by falling through the kill plane, you maintain control of the character for a brief time.  Also importantly, once your death is recorded, the clock stops.  So the goal here is to intentionally die as fast as you can, and then you have about 2.9 seconds to freely move around with the clock stopped.  Normally there isn't much you can do in that time after falling through the kill plane, but this is Security Hall.  The emerald is a bit ahead of and above you, and--how conveniently--the fans are still there to blow you back up.  The fixed position of the camera during this time makes it very difficult to aim your course up into the emerald properly, but it can be done, and you'll likely get a time for this segment of less than 3 seconds.

Remember that when you die by getting hit, you enter an uncontrollable death animation.  But when you die by falling through the kill plane, you maintain control of the character for a brief time.  Also importantly, once your death is recorded, the clock stops.  So the goal here is to intentionally die as fast as you can, and then you have about 2.9 seconds to freely move around with the clock stopped.  Normally there isn't much you can do in that time after falling through the kill plane, but this is Security Hall.  The emerald is a bit ahead of and above you, and--how conveniently--the fans are still there to blow you back up.  The fixed position of the camera during this time makes it very difficult to aim your course up into the emerald properly, but it can be done, and you'll likely get a time for this segment of less than 3 seconds.