Final missions above ground (M30, co-op M20), surface option for versus matches, docs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/en.lang

@@ -572,7 +572,7 @@ camp.m29.story = Lava islands, master, with springs of mana boiling in the middl
 camp.m20.title = The Grand Master
 camp.m20.story = Grand Master Valerian Brightshield waits in his citadel beyond the great river, with the last shard and the gate of the order. He has prayed, polished and prepared for a hundred years. | Destroy his gate and take back the shard. Then your core is whole - and every master who ever wanted it will come for it at once. One thing at a time.
 camp.m30.title = The Throne of the Deep
-camp.m30.story = It happened as I said: your core is whole, and now everybody wants it. Mossgrim and Lady Nightwell march together, and what is left of the Order opens its gate one last time. | Destroy both master cores and the gate of the order. After this the deep has exactly one master. Guess who. Hint: not me, I am the tea man.
+camp.m30.story = It happened as I said: your core is whole, and now everybody wants it. Mossgrim and Lady Nightwell have dug their way up to the surface, and the High Marshal waits in his fortress in the forest – daylight, birds, the works. Disgusting. | Climb out of the rock, destroy both master cores and the gate of the order inside the fortress. After this the world has exactly one master. Guess who. Hint: not me, I am the tea man.
 camp.epilogue = The green core crumbles, the blue one goes dark, and the gate of the order falls silent. Somewhere above, the Lightwatch is writing a very long report, and Lady Nightwell's letters have stopped coming. | Crookfinger has made tea. You are whole, master. The underworld is yours.
 lair.arrivals = {0} free beds: new creatures arrive at {1}% speed
 job.help = Helping
@@ -1540,7 +1540,7 @@ coop.m19.boss = The High Marshal has fallen! His armour clatters like a dropped
 coop.m19.t1 = He waits in the east. Let him wait. Clear the guards first.
 coop.m19.t2 = Knights and archers again. The Order is running out of ideas.
 coop.m20.title = Mossgrim's Fall
-coop.m20.story = With the High Marshal gone, Mossgrim stands alone. He has taken the shape of an ember wyrm and gathered every creature that still listens to him.\n\nEnd the traitor. End his army. And then, masters - tea.
+coop.m20.story = With the High Marshal gone, Mossgrim stands alone – up in the forest, in the sun, of all places. He has taken the shape of an ember wyrm and gathered every creature that still listens to him.\n\nClimb out of the rock and end the traitor. End his army. And then, masters - tea.
 coop.m20.start = Mossgrim, you old fungus. The league sends its regards.
 coop.m20.goal = Defeat Mossgrim and all his creatures.
 coop.m20.boss = Mossgrim is no more. The moss will grow back. He will not.