MAP25: Unstable Journey (BTSX-E2)

MAP25: Unstable Journey is the twenty-fifth and penultimate map of the second episode of Back to Saturn X. It was designed by Brett Harrell (Mechadon) and uses the music track "Weather Warning," composed by James Paddock (Jimmy).

Official

 * 1) Directly west of the beginning area is a zone where an elevator with a backpack on top can be seen. The elevator can be lowered using a switch on the wall opposite to it, which requires the blue key to unlock. The zone on top of the elevator with the plasma gun and some energy cells counts as a secret.  (sector 1860)
 * 2) On the path to the yellow key (north-central part of the map), there is a zone where you need to walk across two pillars then drop into a hole. After dropping into the hole, there is a nearby elevator with a backpack on top. A blood-strained wall on that area can be lowered leading to a soulsphere. (sector 1781)
 * 3) In the small maze on the north-eastern part of the map which leads to a red room with a BFG 9000, one of the walls on the eastern part of the maze can be lowered to reveal some boxes of rockets and an energy cell pack. (sector 1592)
 * 4) Around the center of the map, there is a room with four fireplaces which finally leads to the computer area map. Immediately before this room is a very dark passage with two pillars. Press on the blinking pentagram figure on that passage to open some walls in the room with the fireplaces to reveal a secret area where an invulnerability or a megaarmor can be obtained depending on the difficulty. (sector 1140)
 * 5) On the path to the red key, in the center-west part of the map, there is a zone where a megasphere can be observed on a pedestal up above. Nearby is an elevator which can be used to access a small room containing a berserk pack. Pressing on the pentagram-inscribed wall there will lower it and reveal a passage with some goodies. (sector 1428)
 * 6) At the end of the passage in secret #5, there is a window through which a switch can be seen. Shoot the switch to open a relatively large section of the map to the east of the switch which leads to a secret megasphere. (sector 1204)
 * 7) On the path to the red key, in the center-west part of the map, there is a section with lavafalls which create a pool of lava with two big stepping stones. From the rocky section with stairs immediately following this section, there is a path which allows to get to an elevated level where you can get a panorama of the lava pool. From there, jump across to the other side (to the left of the evil eye) to reach a cache of three energy cell packs. (sector 413)
 * 8) After getting the red key from the arena encircled by lavafalls where a big fight takes place (with up to two cyberdemons on higher difficulties), ride the elevator which allows getting out of this arena to the top, and from there you can drop to a small secret area containing an energy cell pack. (sector 951)

Non-official

 * 1) To the west of the red room with a BFG 9000 in the north-eastern part of the map, there is a room with a megaarmor, soul sphere, boxes of rockets and energy cell packs and a blinking "LOL" text. This room is behind a false wall over the bookcase with the blue torch in the north-west corner of the red room. (TODO: Can/how does one get there legit? Is one supposed to do a massive arch-vile jump while invulnerable?)

Current records
The records for the map at the Doomed Speed Demos Archive are:

Miscellaneous demos
''This information was last verified in its entirety on January 20, 2018.

Player spawns
This level contains seventeen spawn points:
 * 1) facing north-east. (thing 2421)
 * 2) facing north-west. (thing 2422)
 * 3) facing north-east. (thing 2423)
 * 4) facing south. (thing 2424)
 * 5) facing west. (thing 2425)
 * 6) facing south. (thing 2426)
 * 7) facing south. (thing 2427)
 * 8) facing south-west. (thing 2428)
 * 9) facing west. (thing 2429)
 * 10) facing south-west. (thing 2430)
 * 11) facing south-west. (thing 2431)
 * 12) facing west. (thing 2432)
 * 13) facing south. (thing 2433)
 * 14) facing east. (thing 2434)
 * 15) facing north-east. (thing 2435)
 * 16) facing south. (thing 2436)
 * 17) facing north-west. (thing 2437)

Things
This level contains the following numbers of things per skill level: