diff --git a/lang/cs.lang b/lang/cs.lang
index 067e760..8eaa416 100644
--- a/lang/cs.lang
+++ b/lang/cs.lang
@@ -884,7 +884,7 @@ room.forge = Kovárna
 tool.forge.label = Kovárna
 tool.forge.desc = Tvorové tu vyrábějí pasti a dveře - práce, žádné zlato. Hotové kusy čekají v bednách, dokud je čertík nenainstaluje. Kvůli kovárně od 6 políček přicházejí coglingové.
 unit.cogling = Cogling
-cat.traps = Pasti
+cat.traps = Stavby
 cost.work = {0} práce v kovárně
 job.forge = Kuje
 job.install = Instaluje past
diff --git a/lang/da.lang b/lang/da.lang
index 2236d7e..061e2b9 100644
--- a/lang/da.lang
+++ b/lang/da.lang
@@ -883,7 +883,7 @@ room.forge = Smedje
 tool.forge.label = Smedje
 tool.forge.desc = Væsner fremstiller fælder og døre her - arbejde, intet guld. Færdige stykker venter i kasser, til en imp installerer dem. Tandhjulinger kommer for en smedje på 6+ felter.
 unit.cogling = Tandhjuling
-cat.traps = Fælder
+cat.traps = Byg
 cost.work = {0} arbejde i smedjen
 job.forge = Smeder
 job.install = Installerer en fælde
diff --git a/lang/de.lang b/lang/de.lang
index 857bcbe..6b16562 100644
--- a/lang/de.lang
+++ b/lang/de.lang
@@ -883,7 +883,7 @@ room.forge = Schmiede
 tool.forge.label = Schmiede
 tool.forge.desc = Kreaturen fertigen hier Fallen und Türen - Arbeit, kein Gold. Fertige Stücke warten in Kisten, bis ein Imp sie einbaut. Coglinge kommen für eine Schmiede ab 6 Feldern.
 unit.cogling = Cogling
-cat.traps = Fallen
+cat.traps = Bauen
 cost.work = {0} Arbeit in der Schmiede
 job.forge = Schmiedet
 job.install = Baut eine Falle ein
diff --git a/lang/el.lang b/lang/el.lang
index 386746f..35de2ee 100644
--- a/lang/el.lang
+++ b/lang/el.lang
@@ -884,7 +884,7 @@ room.forge = Σιδηρουργείο
 tool.forge.label = Σιδηρουργ.
 tool.forge.desc = Εδώ τα πλάσματα κατασκευάζουν παγίδες και πόρτες - με δουλειά, όχι χρυσό. Τα έτοιμα κομμάτια περιμένουν σε κιβώτια ώσπου να τα εγκαταστήσει ένα δαιμονάκι. Οι Γραναζάκηδες έρχονται για σιδηρουργείο 6+ πλακιδίων.
 unit.cogling = Γραναζάκης
-cat.traps = Παγίδες
+cat.traps = Κατασκευή
 cost.work = {0} δουλειά στο σιδηρουργείο
 job.forge = Σφυρηλατεί
 job.install = Εγκαθιστά παγίδα
diff --git a/lang/en.lang b/lang/en.lang
index 3f6297c..f71e392 100644
--- a/lang/en.lang
+++ b/lang/en.lang
@@ -884,7 +884,7 @@ room.forge = Forge
 tool.forge.label = Forge
 tool.forge.desc = Creatures manufacture traps and doors here - work, no gold. Finished pieces wait in crates until an imp installs them. Coglings come for a forge of 6+ tiles.
 unit.cogling = Cogling
-cat.traps = Traps
+cat.traps = Build
 cost.work = {0} work in the forge
 job.forge = Forging
 job.install = Installing a trap
diff --git a/lang/es.lang b/lang/es.lang
index 764901b..1f99aec 100644
--- a/lang/es.lang
+++ b/lang/es.lang
@@ -876,7 +876,7 @@ room.forge = Forja
 tool.forge.label = Forja
 tool.forge.desc = Las criaturas fabrican aquí trampas y puertas: trabajo, no oro. Las piezas terminadas esperan en cajas hasta que un diablillo las instala. Con una forja de 6+ casillas vienen engranajillos.
 unit.cogling = Engranajillo
-cat.traps = Trampas
+cat.traps = Construir
 cost.work = {0} de trabajo en la forja
 job.forge = Forjando
 job.install = Instalando una trampa
diff --git a/lang/fi.lang b/lang/fi.lang
index 58605b7..b343303 100644
--- a/lang/fi.lang
+++ b/lang/fi.lang
@@ -884,7 +884,7 @@ room.forge = Paja
 tool.forge.label = Paja
 tool.forge.desc = Olennot valmistavat täällä ansoja ja ovia - työtä, ei kultaa. Valmiit kappaleet odottavat laatikoissa, kunnes piru asentaa ne. Rattaiset tulevat pajaan, jossa on 6+ ruutua.
 unit.cogling = Rattainen
-cat.traps = Ansat
+cat.traps = Rakenna
 cost.work = {0} työtä pajassa
 job.forge = Takoo
 job.install = Asentaa ansaa
diff --git a/lang/hr.lang b/lang/hr.lang
index dfe2b02..bd820b9 100644
--- a/lang/hr.lang
+++ b/lang/hr.lang
@@ -884,7 +884,7 @@ room.forge = Kovačnica
 tool.forge.label = Kovačnica
 tool.forge.desc = Stvorenja ovdje izrađuju zamke i vrata - rad, bez zlata. Gotovi komadi čekaju u sanducima dok ih vražić ne postavi. Zupčići dolaze zbog kovačnice od 6+ polja.
 unit.cogling = Zupčić
-cat.traps = Zamke
+cat.traps = Gradnja
 cost.work = {0} rada u kovačnici
 job.forge = Kuje
 job.install = Postavlja zamku
diff --git a/lang/hu.lang b/lang/hu.lang
index 9024cfa..8027492 100644
--- a/lang/hu.lang
+++ b/lang/hu.lang
@@ -884,7 +884,7 @@ room.forge = Kohó
 tool.forge.label = Kohó
 tool.forge.desc = Itt gyártanak a lények csapdákat és ajtókat - munkával, arany nélkül. A kész darabok ládákban várnak, amíg egy manó be nem szereli őket. Egy 6+ mezős kohóért fogasmanók jönnek.
 unit.cogling = Fogasmanó
-cat.traps = Csapdák
+cat.traps = Építés
 cost.work = {0} munka a kohóban
 job.forge = Kovácsol
 job.install = Csapdát szerel be
diff --git a/lang/it.lang b/lang/it.lang
index 65b47fc..bd3686e 100644
--- a/lang/it.lang
+++ b/lang/it.lang
@@ -876,7 +876,7 @@ room.forge = Fucina
 tool.forge.label = Fucina
 tool.forge.desc = Le creature fabbricano qui trappole e porte - lavoro, niente oro. I pezzi finiti aspettano in casse finché un imp non li installa. Gli Ingranotti vengono per una fucina di 6+ caselle.
 unit.cogling = Ingranotto
-cat.traps = Trappole
+cat.traps = Costruire
 cost.work = {0} di lavoro in fucina
 job.forge = Forgia
 job.install = Installa una trappola
diff --git a/lang/nl.lang b/lang/nl.lang
index a1b7717..bcb0f5a 100644
--- a/lang/nl.lang
+++ b/lang/nl.lang
@@ -884,7 +884,7 @@ room.forge = Smederij
 tool.forge.label = Smederij
 tool.forge.desc = Wezens maken hier vallen en deuren - werk, geen goud. Afgewerkte stukken wachten in kisten tot een imp ze plaatst. Tandwielers komen voor een smederij van 6+ vakken.
 unit.cogling = Tandwieler
-cat.traps = Vallen
+cat.traps = Bouwen
 cost.work = {0} werk in de smederij
 job.forge = Smeedt
 job.install = Plaatst een val
diff --git a/lang/no.lang b/lang/no.lang
index 6b388d0..e1b690c 100644
--- a/lang/no.lang
+++ b/lang/no.lang
@@ -883,7 +883,7 @@ room.forge = Smie
 tool.forge.label = Smie
 tool.forge.desc = Skapninger lager feller og dører her - arbeid, ikke gull. Ferdige stykker venter i kasser til en imp installerer dem. Tannhjulinger kommer for en smie på 6+ ruter.
 unit.cogling = Tannhjuling
-cat.traps = Feller
+cat.traps = Bygg
 cost.work = {0} arbeid i smia
 job.forge = Smir
 job.install = Installerer en felle
diff --git a/lang/pt.lang b/lang/pt.lang
index d004ddf..1bdb65d 100644
--- a/lang/pt.lang
+++ b/lang/pt.lang
@@ -884,7 +884,7 @@ room.forge = Forja
 tool.forge.label = Forja
 tool.forge.desc = As criaturas fabricam aqui armadilhas e portas - trabalho, sem ouro. As peças prontas esperam em caixotes até um diabrete as instalar. Com uma forja de 6+ casas, vêm Engrenitos.
 unit.cogling = Engrenito
-cat.traps = Armadilhas
+cat.traps = Construir
 cost.work = {0} de trabalho na forja
 job.forge = A forjar
 job.install = A instalar uma armadilha
diff --git a/lang/ro.lang b/lang/ro.lang
index 3d3eeca..0adb254 100644
--- a/lang/ro.lang
+++ b/lang/ro.lang
@@ -884,7 +884,7 @@ room.forge = Forjă
 tool.forge.label = Forjă
 tool.forge.desc = Creaturile fabrică aici capcane și uși - muncă, nu aur. Piesele terminate așteaptă în lăzi până le montează un drăcușor. Rotițarii vin pentru o forjă de 6+ dale.
 unit.cogling = Rotițar
-cat.traps = Capcane
+cat.traps = Construcții
 cost.work = {0} muncă în forjă
 job.forge = Forjează
 job.install = Montează o capcană
diff --git a/lang/ru.lang b/lang/ru.lang
index 5baae99..127c014 100644
--- a/lang/ru.lang
+++ b/lang/ru.lang
@@ -876,7 +876,7 @@ room.forge = Кузница
 tool.forge.label = Кузница
 tool.forge.desc = Здесь существа делают ловушки и двери - за работу, не за золото. Готовые изделия ждут в ящиках, пока бесёнок их не установит. На кузницу от 6 клеток приходят шестерёнки.
 unit.cogling = Шестерёнок
-cat.traps = Ловушки
+cat.traps = Постройки
 cost.work = {0} работы в кузнице
 job.forge = Куёт
 job.install = Ставит ловушку
diff --git a/lang/sk.lang b/lang/sk.lang
index bf88863..b4f057e 100644
--- a/lang/sk.lang
+++ b/lang/sk.lang
@@ -884,7 +884,7 @@ room.forge = Vyhňa
 tool.forge.label = Vyhňa
 tool.forge.desc = Tvory tu vyrábajú pasce a dvere - práca, žiadne zlato. Hotové kusy čakajú v debnách, kým ich čertík nenainštaluje. Kvôli vyhni od 6 políčok prichádzajú coglingovia.
 unit.cogling = Cogling
-cat.traps = Pasce
+cat.traps = Stavby
 cost.work = {0} práce vo vyhni
 job.forge = Kuje
 job.install = Inštaluje pascu
diff --git a/lang/sr.lang b/lang/sr.lang
index 9f2b9bf..6b4193f 100644
--- a/lang/sr.lang
+++ b/lang/sr.lang
@@ -884,7 +884,7 @@ room.forge = Ковачница
 tool.forge.label = Ковачница
 tool.forge.desc = Створења овде израђују замке и врата - рад, без злата. Готови комади чекају у сандуцима док их ђаволак не постави. Зупчићи долазе због ковачнице од 6+ поља.
 unit.cogling = Зупчић
-cat.traps = Замке
+cat.traps = Градња
 cost.work = {0} рада у ковачници
 job.forge = Кује
 job.install = Поставља замку
diff --git a/lang/sv.lang b/lang/sv.lang
index 0a09623..7fecc31 100644
--- a/lang/sv.lang
+++ b/lang/sv.lang
@@ -884,7 +884,7 @@ room.forge = Smedja
 tool.forge.label = Smedja
 tool.forge.desc = Varelser tillverkar fällor och dörrar här - arbete, inget guld. Färdiga delar väntar i lådor tills en hob installerar dem. Kugglingar kommer för en smedja på 6+ rutor.
 unit.cogling = Kuggling
-cat.traps = Fällor
+cat.traps = Bygg
 cost.work = {0} arbete i smedjan
 job.forge = Smider
 job.install = Installerar en fälla
diff --git a/src/campaign.rs b/src/campaign.rs
index df8f1ad..88bc586 100644
--- a/src/campaign.rs
+++ b/src/campaign.rs
@@ -10,7 +10,7 @@ use serde::{Deserialize, Serialize};
 // From which mission (0-based) on each tool is available (same order as ui::TOOLS):
 // dig, hand, treasury, lair, farm, training, library, sell, flag, lightning, heal, imp,
 // torture, temple, arrow tower, cannon tower, magic tower, bridge, aerie, steel
-pub const TOOL_UNLOCK: [usize; 47] = [0, 0, 0, 0, 0, 2, 5, 0, 0, 3, 5, 0, 8, 12, 3, 7, 12, 1, 8, 17, 0, 7, 7, 10, 12, 12, 7, 16, 16, 7, 10, 16, 9, 13, 6, 10, 14, 17, 19, 22, 9, 13, 6, 11, 18, 0, 0];
+pub const TOOL_UNLOCK: [usize; crate::ui::TOOLS.len()] = [0, 0, 0, 0, 0, 2, 5, 0, 0, 3, 5, 0, 8, 12, 3, 7, 12, 1, 8, 17, 0, 7, 7, 10, 12, 12, 7, 16, 16, 7, 10, 16, 9, 13, 6, 10, 14, 17, 19, 22, 9, 13, 6, 11, 18, 0, 0, 17, 16, 7, 13, 17];
 
 pub struct FortDef {
     pub at: (f32, f32), // centre as a fraction of the map size
diff --git a/src/research.rs b/src/research.rs
index 0d9f6d0..45925bd 100644
--- a/src/research.rs
+++ b/src/research.rs
@@ -207,6 +207,14 @@ mod tests {
         assert!(!g.can_research(31), "magic doors are far away");
     }
 
+    #[test]
+    fn siege_engines_are_not_known_in_the_first_missions() {
+        let g = crate::campaign::start_mission(0, None);
+        for t in [19, 47, 48, 50, 51] {
+            assert!(!g.tool_allowed(t), "tool {} known in mission 1", t);
+        }
+    }
+
     #[test]
     fn once_everything_is_known_the_library_raises_room_levels() {
         let mut g = Game::new(9, 64, 64);
diff --git a/src/ui.rs b/src/ui.rs
index b521762..14fac58 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -446,9 +446,9 @@ pub const CATS: [(&str, &[usize]); 7] = [
     ("cat.hand", &[1]),
     ("cat.rooms", &[2, 3, 4, 5, 6, 12, 40, 13, 18, 21, 41, 42, 43, 44, 17, 47, 49]),
     ("cat.towers", &[14, 15, 16, 20]),
-    ("cat.traps", &[22, 23, 24, 25, 26, 27, 28, 29, 30, 31]),
+    ("cat.traps", &[22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 19, 50, 51]),
     ("cat.spells", &[9, 10, 11, 32, 33, 34, 35, 36, 37, 38, 39, 48]),
-    ("cat.orders", &[8, 45, 46, 7, 19, 50, 51]),
+    ("cat.orders", &[8, 45, 46, 7]),
 ];
 
 #[derive(Clone, Copy, PartialEq, Debug)]
@@ -1156,7 +1156,7 @@ impl Ui {
                     hover_tool = Some(i);
                 }
                 let key = if touch_ui() { "" } else { keys[i].as_str() };
-                let r = tool_button(bx, by, bw, ti.icon, key, &ti.label, self.tool == TOOLS[i], hovered, !g.tool_allowed(i));
+                let r = tool_button(bx, by, bw, ti.icon, key, &ti.label, self.tool == TOOLS[i], hovered, !g.tool_allowed(i) || (matches!(TOOLS[i], Tool::Siege(_)) && g.forge_tiles() == 0));
                 self.touch_btns.push((r, TBtn::Tool(i)));
             }
             popup_top = py0;