Episode I: The Terran Incident
--PRESENT--
[MAP01] Temporal Research Labs -- in development
--PAST AND FUTURE--
[MAP02] Hastings 		-- finished
[MAP03] Dreadmere 		-- in development
[MAP04] Crystal Caverns 	-- in high concept stage
[MAP05] title pending 		-- level by mantra
[MAP06] Minos Space Station 	-- in development
[MAP07] The Tower of Babel 	-- in high concept, fight Lesser Demon
--PRESENT--
[MAP08] Temporal Research Labs 	-- based on MAP01 -- in development

Episode II: Book of the Halcyon
--VARIOUS TIMES--
[MAP09] Bereft 		-- level by Recidivus, 95% complete
[MAP10] title pending 	-- level by Adam Williamson, 60% complete
[MAP11] title pending 	-- level by Holger Nathrath, complete
[MAP12] title pending	-- level by Holger Nathrath, complete
[MAP13] title pending	-- level by Hyena (status unknown)
[MAP14] title pending	-- level by Holger Nathrath, complete
[MAP15] title pending	-- level by Holger Nathrath, complete
--THE HALCYON--
[MAP16] Gate to Halcyon    -- contributed by DGevert, 97% complete
[MAP17] Halcyon Labyrinth  -- battle with Leader Cleric (0%)
[MAP18] Temple of Light    -- Dreadmere in past, find Ankh here
[MAP19] Halcyon Badlands   -- in development, Battle of the Halcyon
[MAP20] Hell's Gates

Episode III: Into the Abyss
--HELL'S PAST--
[MAP21] River of Fate 	-- First Circle, no guardian
[MAP22] Minos 		-- Second Circle, guardian Minos
[MAP23] Cerberus 	-- Third Circle, guardian Cerberus
[MAP24] Plutus 		-- Fourth Circle, guardian Plutus
[MAP25] Phlegyas 	-- Fifth Circle, guardian Phlegyas
[MAP26] City of Dis 	-- Succubus encounter
[MAP27] Forest of Grief -- Sixth Circle, no guardian
[MAP28] Desert of Rage 	-- Seventh Circle, guardian Minotaurus
[MAP29] The Eighth Circle -- tenative, no guardian
[MAP30] Lord of the Flies -- Beelzebub
(all 0% complete)

--SECRET--
[MAP31] title pending
[MAP32] Paradoxical Enigma -- crazy level
(0% complete)

1 level, auxilliary, by Chrozoron, unplaced

In-game story developments by MAP
[MAP01] Marine meets UAC scientist who tells him more about the anomaly
        and what has happened, Marine jumps into the time portal and...
[MAP02] finds himself in the past, jumping from time period to time period

[MAP03] The marine finds himself in a post-apocalyptic future, in the
        ruins of what was once a beautiful temple, now overrun by swamp
        life. (details not explicit in game)  This will later be revealed
        as the Temple of Light in the Halcyon. Player will meet Halif
        Swordsmythe, the 240-year-old Halcyonian dwarf here.  Dialog will
        be engaged, and the dwarf will join your party for the next several
        levels.

[MAP07] A new enemy has been sent to oversee the completion of the Tower
        of Babel (to offset the fates toward evil) -- you must climb the
        tower and defeat the enemy.  At the end, another time portal is
        revealed -- you plunge through and pray it takes you home and...
[MAP08] It does!  You're back at the UAC base, but something isn't right.
        Either they took a long lunch break or... everyone's dead!  You
        find the scientist who sent you on this mission crumpled on the
        floor, with a visceral wound that could only have been caused by 
        some horrible claw.  He murmurs his last words in your ear, "Go back 
        in... its... not over... yet..." and then he dies without explaining 
        what the hell went wrong.  All you know is that the time line hasn't 
        been restored, and you've got to go back into the fray yet again... 
        (you have to beat a guardian to get to the portal)

[MAP16] What is this?  After much wandering, you have finally found yourself
        in a place still populated by humans.  This place is called the
        Halcyon, and it is the final great stronghold of human resistance in
        this continuum.  The people here are medieval in terms of technology
        and understanding of the world, and they maintain a culture based
        around the use and power of white magic.  They are vehement followers
        of God and believe that they draw Holy power directly from his
        guidance.  You're not one to argue, as they're more than willing to
        demonstrate their powers on you -- they believe you are yet another
        new breed of hellspawn.  Can you convince them otherwise?
[MAP17] You made it into the Halcyon, taking down several of their Clerics
        and Warriors in the process, but only to be ambushed.  Simple
        execution would be too good for a demon of your sort, so they've
        thrown you into the Labyrinth, a terrible maze-like place built to
        mette out punishment upon heretics, hellspawn, and followers of Satan.
        At the end of your arduous journey here, provided you survive, you
        will face one of their most powerful warriors in battle.
[MAP18] You escaped from the Labyrinth and defeated the warrior, but the open
        arms of your executioners awaited you at the exit.  If not for some
        unexpected help from the missing sergeant from your time who wandered 
        into the portal and became the commander-in-chief of the Halcyon 
        Resistance, you would be toast in a serious way.  They revere him 
        because he claims divine guidance, and while you don't know whether its 
        true or not, it wouldn't surprise you much in a world of hellspawn and 
        white magic.  As such, they have taken his word that you are not a demon,
        but are indeed the legendary Warrior of Time whose coming was
        prophesied to them long ago.  It is said that the Warrior of Time is
        the only one who can reunite the three pieces of the shattered
        Ankh of Demon's Bane, an ancient holy weapon brought down from Heaven
        by way of the Tower of Babel. After it has been united, it is said
        the Warrior will lead the men of the Halcyon into the final decisive
        battle against the hellspawn.  The responsibility is in your hands;
        failure will mean your death and the extinction of the human race.
        You are taken to the Temple of Light, a strangely familiar place,
        and there you must complete the ritual tasks ahead.
[MAP19] The Ankh complete, you go ahead to the Halcyon Badlands, where the
        final battle is to take place.  Hellspawn have already overrun this
        area of the Halcyon, and lay in wait for any soul to steal.  The
        entire Halcyon Resistance will be here soon, and when they arrive, be
        quick to their assistance.  While even their mightiest will join the
        ranks, only you bear the legendary Ankh, which is not only powerful
        in its own right, but brings courage to even the cowardliest of the
        warriors.

[MAP20] Consummatum est.  The hellspawn have been defeated, and the tides
        of battle have been reversed.  The warriors of the Halcyon will have
        no trouble re-establishing a strong foothold over the entire world,
        especially as they are joined by other straggling bands of humans
        along the way.  You know you can't stay here, however... something
        deep inside you pushes you on, as if though victory is not enough.
        And as you listen to your soul, you find its not.  You want more.
        You want revenge.  Revenge for every single human life taken since
        the invasion began that fateful moment on Phobos.  The images that
        live inside your mind will never die, but they might be faded if only
        you can really put the hurt on Hell for good.  While you destroyed
        the Inferno in the future, here it is intact.  And as the Halcyonians
        pointed out to you, one of the hellspawn's first priorities had
        been establishing a gate to Hell.  A gate to Hell's Past.  This must
        have been Baphomet's final plan.  If invasion had failed because
        of man's technology, then his death would not be in vain if it became
        a gate into an earlier time, where Hell could bring mankind to his
        knees before he ever made a stand.  An uncontrollable bloodlust
        raging in your heart, you depart from the Halcyon for Hell's Gates
        and prepare yourself to descend into the abyss.

[MAP30] Sending Satan's Second back into the abyss releases an
        unimaginable force.  You cling to life and sanity in the hellstorm
        that ensues, praying to every god you've ever heard of as Beelzebub
        falls into the bottomless pit and is encased in burning ice once
        again.  The final blinding flash of light subsides, and you see
        before you yet another time portal.  Your mind reels as you think
        of what may lie ahead, but you manage to get up and make it through
        the portal to find yourself no longer in Hell.  You're face down in
	a cold puddle of rain on hard blacktop. At first you think
	maybe you'll lay here for a while and just pray you're back home,
	but you're rudely jolted by the blaring of a truck horn.  You manage
	to bend your stiff neck upward just enough to see the warm blue glow
	of the UAC logo outside the Terran Temporal Research Facility.
	A concerned scientist comes running from the building, wondering what
	the commotion is.  You black out, and the next thing you know you're
	lying safe and sound in a hospital bed, with faces smiling down at
	you.  It looks like after such a long, hard struggle, you've finally
	really won.  The hellspawn are gone forever, the architecture of hell
	shattered by your vigilence, the powers of darkness supressed by
	the light in your soul.  You drift off to sleep, assured that
	tonight you won't be haunted by the nightmares of your past.
	
	Meanwhile, centuries earlier...

	A magician blows dust off the cover of an ancient book, the inscription 
	on the front reading "Necronomicon" ... He stops, looks around the 
	silent library for a moment, and decides that he is alone. Hesitantly 
	he looks at the exquisitely crafted seal on the book, and reaches out 
	to break it. As soon as the seal is released, the tome flies open of 
	its own will. The magician, stuttering terribly, reads from its pages, 
	and suddenly a blinding light permeates all of his perception.  He 
	hears a dark voice promising him great rewards for releasing the powers 
	of darkness pent up in the book, and suddenly he knows that this was no 
	mistake.  He would show his insolent peers that their petty white magic 
	is nothing compared to the powers of unbridled evil.  He would make 
	them suffer for rejecting him as an untalented magician,and ultimately, 
	he would overthrow the vile theocrarcy that he abhorred so much and 
	seat himself as the rightful ruler he knew he was meant to be. This was 
	his destiny!  This was the alpha, and the omega.  The beginning of new 
        turmoil, and the end of a short-lived peace in the land known as the 
        Halcyon...

Other elements along the way:
Meet Pinhead in Minos Space Station -- Hellraiser spoof
Encounter Succubus during City of Dis level