Limit to showing 6 concepts. For now, show the last 6 in the array.

app/templates/play/campaign-view.jade

@@ -39,9 +39,9 @@ if campaign
                 a.spr(href="/contribute/adventurer")
                   strong(data-i18n="play.awaiting_levels_adventurer") Sign up as an Adventurer
                 span.spl(data-i18n="play.awaiting_levels_adventurer_suffix") to be the first to play new levels.
-            if level.concepts && level.concepts.length
+            if level.displayConcepts && level.displayConcepts.length
               p
-                for concept in level.concepts
+                for concept in level.displayConcepts
                   kbd(data-i18n="concepts." + concept)
 
             if !level.disabled && !level.locked

app/views/play/CampaignView.coffee

@@ -275,6 +275,11 @@ module.exports = class CampaignView extends RootView
     if level.unlocksHero
       level.purchasedHero = level.unlocksHero in (me.get('purchased')?.heroes or [])
     level.hidden = level.locked
+    if level.concepts?.length
+      level.displayConcepts = level.concepts
+      maxConcepts = 6
+      if level.displayConcepts.length > maxConcepts
+        level.displayConcepts = level.displayConcepts.slice -maxConcepts
     level
 
   countLevels: (levels) ->