diff --git a/client/src/components/inventory.tsx b/client/src/components/inventory.tsx
index a358e5bc..b2432a08 100644
--- a/client/src/components/inventory.tsx
+++ b/client/src/components/inventory.tsx
@@ -5,7 +5,7 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { faLock, faBan } from '@fortawesome/free-solid-svg-icons'
 import { GameIdContext } from '../app';
 import Markdown from './markdown';
-import { useLoadDocQuery, InventoryTile, LevelInfo, InventoryOverview, useLoadInventoryOverviewQuery } from '../state/api';
+import { useLoadDocQuery, InventoryTile, LevelInfo, InventoryOverview, useLoadInventoryOverviewQuery, WorldOverview } from '../state/api';
 import { selectDifficulty, selectInventory } from '../state/progress';
 import { store } from '../state/store';
 import { useSelector } from 'react-redux';
@@ -37,6 +37,79 @@ export function Inventory({levelInfo, openDoc, enableAll=false} :
   )
 }
 
+export function OverviewInventory({data, openDoc, enableAll=false, showOverview=true} :
+  {
+    data: WorldOverview[],
+    openDoc: (props: {name: string, type: string}) => void,
+    enableAll?: boolean,
+    showOverview?: boolean
+  }) {
+
+  const gameId = React.useContext(GameIdContext)
+  const difficulty = useSelector(selectDifficulty(gameId))
+  const [tab, setTab] = useState<string>()
+  let inv: string[] = selectInventory(gameId)(store.getState())
+
+  let levelInfo : InventoryOverview = {
+    tactics : data ? data.map(world => (world.tactics.map(tile => inv.includes(tile.name) ? {...tile, locked: false} : tile))).flat() : [],
+    lemmas : data ? data.map(world => (world.lemmas.map(tile => inv.includes(tile.name) ? {...tile, locked: false} : tile))).flat() : [],
+    definitions : data ? data.map(world => (world.definitions.map(tile => inv.includes(tile.name) ? {...tile, locked: false} : tile))).flat() : [],
+    lemmaTab: null,
+  }
+
+  return (
+    <>
+      <Inventory levelInfo={levelInfo} openDoc={openDoc} enableAll={enableAll}/>
+      {showOverview &&
+        <div className="inventory">
+          {data && <>
+            <h2>Overviews</h2>
+            <div className="tab-bar">
+              {data.map(world => {
+                return <div key={`category-${world.world}`} className={`tab ${world.world == tab ? "active": ""}`} onClick={() => { setTab((tab == world.world) ? null : world.world) }}>{world.world}</div>
+              })}
+            </div>
+            <div className="inventory-list">
+              {/* TODO: a bit hacky, do we need to redesign inventory completely and provide it in a better order? */}
+              {data.map(world => {
+                if (world.world == tab) {
+                  return [
+                    ...world.tactics.map(item => {
+                      return <InventoryItem
+                        key={`${world.world}-${item.name}`}
+                        showDoc={() => {openDoc({name: item.name, type: 'Tactic'})}}
+                        name={item.name} displayName={item.displayName}
+                        locked={difficulty > 0 ? !inv.includes(item.name) : false}
+                        disabled={item.disabled} newly={false} enableAll={enableAll} />
+                    }),
+                    ...world.lemmas.map(item => {
+                      return <InventoryItem
+                        key={`${world.world}-${item.name}`}
+                        showDoc={() => {openDoc({name: item.name, type: 'Lemma'})}}
+                        name={item.name} displayName={item.displayName}
+                        locked={difficulty > 0 ? item.locked : false}
+                        disabled={item.disabled} newly={false} enableAll={enableAll} />
+                    }),
+                    ...world.definitions.map(item => {
+                      return <InventoryItem
+                        key={`${world.world}-${item.name}`}
+                        showDoc={() => {openDoc({name: item.name, type: 'Definition'})}}
+                        name={item.name} displayName={item.displayName}
+                        locked={difficulty > 0 ? item.locked : false}
+                        disabled={item.disabled} newly={false} enableAll={enableAll} />
+                    })
+                  ]
+                }
+              })}
+            </div>
+          </>}
+        </div>
+      }
+    </>
+
+  )
+}
+
 function InventoryList({items, docType, openDoc, defaultTab=null, level=undefined, enableAll=false} :
   {
     items: InventoryTile[],
@@ -144,3 +217,21 @@ export function InventoryPanel({levelInfo, visible = true}) {
     }
   </div>
 }
+
+/** The panel (on the welcome page) showing the user's inventory with tactics, definitions, and lemmas */
+export function InventoryOverviewPanel({data, visible = true, showOverview=true} : {data : WorldOverview[], visible?: boolean, showOverview?: boolean}) {
+  const gameId = React.useContext(GameIdContext)
+
+  // The inventory is overlayed by the doc entry of a clicked item
+  const [inventoryDoc, setInventoryDoc] = useState<{name: string, type: string}>(null)
+  // Set `inventoryDoc` to `null` to close the doc
+  function closeInventoryDoc() {setInventoryDoc(null)}
+
+  return <div className={`column inventory-panel ${visible ? '' : 'hidden'}`}>
+    {inventoryDoc ?
+      <Documentation name={inventoryDoc.name} type={inventoryDoc.type} handleClose={closeInventoryDoc}/>
+      :
+      <OverviewInventory data={data} openDoc={setInventoryDoc} enableAll={true} showOverview={showOverview}/>
+    }
+  </div>
+}
diff --git a/client/src/components/level.tsx b/client/src/components/level.tsx
index 1251645b..579b9470 100644
--- a/client/src/components/level.tsx
+++ b/client/src/components/level.tsx
@@ -26,7 +26,7 @@ import { changedSelection, codeEdited, selectCode, selectSelections, selectCompl
 import { store } from '../state/store'
 import { Button } from './button'
 import Markdown from './markdown'
-import {InventoryPanel} from './inventory'
+import {InventoryOverviewPanel, InventoryPanel} from './inventory'
 import { hasInteractiveErrors } from './infoview/typewriter'
 import { DeletedChatContext, InputModeContext, MobileContext, MonacoEditorContext,
   ProofContext, ProofStep, SelectionContext, WorldLevelIdContext } from './infoview/context'
@@ -498,7 +498,7 @@ function Introduction({impressum, setImpressum}) {
             }
 
           </div>
-          <InventoryPanel levelInfo={inventory?.data} />
+          <InventoryOverviewPanel data={inventory?.data} />
         </Split>
       }
 
diff --git a/client/src/components/welcome.tsx b/client/src/components/welcome.tsx
index 6c6c9773..cc2e0af1 100644
--- a/client/src/components/welcome.tsx
+++ b/client/src/components/welcome.tsx
@@ -11,7 +11,7 @@ import { changedOpenedIntro, selectOpenedIntro } from '../state/progress'
 import { useGetGameInfoQuery, useLoadInventoryOverviewQuery } from '../state/api'
 import { Button } from './button'
 import { MobileContext } from './infoview/context'
-import { InventoryPanel } from './inventory'
+import { InventoryOverviewPanel, InventoryPanel } from './inventory'
 import { ErasePopup } from './popup/erase'
 import { InfoPopup } from './popup/game_info'
 import { PrivacyPolicyPopup } from './popup/privacy_policy'
@@ -111,7 +111,7 @@ function Welcome() {
               <WorldTreePanel worlds={gameInfo.data?.worlds} worldSize={gameInfo.data?.worldSize}
                 rulesHelp={rulesHelp} setRulesHelp={setRulesHelp} />
             :
-              <InventoryPanel levelInfo={inventory?.data} />
+              <InventoryOverviewPanel data={inventory?.data} />
             )}
           </div>
         :
@@ -119,7 +119,7 @@ function Welcome() {
             <IntroductionPanel introduction={gameInfo.data?.introduction} setPageNumber={setPageNumber} />
             <WorldTreePanel worlds={gameInfo.data?.worlds} worldSize={gameInfo.data?.worldSize}
               rulesHelp={rulesHelp} setRulesHelp={setRulesHelp} />
-            <InventoryPanel levelInfo={inventory?.data} />
+            <InventoryOverviewPanel data={inventory?.data} />
           </Split>
       }
     </div>
diff --git a/client/src/state/api.ts b/client/src/state/api.ts
index 2bdbe8b2..ed17d056 100644
--- a/client/src/state/api.ts
+++ b/client/src/state/api.ts
@@ -71,6 +71,13 @@ interface Doc {
   category: string,
 }
 
+export interface WorldOverview {
+  world: string
+  tactics: InventoryTile[]
+  lemmas: InventoryTile[]
+  definitions: InventoryTile[]
+}
+
 // Define a service using a base URL and expected endpoints
 export const apiSlice = createApi({
   reducerPath: 'gameApi',
@@ -82,7 +89,7 @@ export const apiSlice = createApi({
     loadLevel: builder.query<LevelInfo, {game: string, world: string, level: number}>({
       query: ({game, world, level}) => `${game}/level__${world}__${level}.json`,
     }),
-    loadInventoryOverview: builder.query<InventoryOverview, {game: string}>({
+    loadInventoryOverview: builder.query<WorldOverview[], {game: string}>({
       query: ({game}) => `${game}/inventory.json`,
     }),
     loadDoc: builder.query<Doc, {game: string, name: string, type: "lemma"|"tactic"}>({
diff --git a/server/GameServer/EnvExtensions.lean b/server/GameServer/EnvExtensions.lean
index a1e15f32..bfb72e7c 100644
--- a/server/GameServer/EnvExtensions.lean
+++ b/server/GameServer/EnvExtensions.lean
@@ -269,6 +269,13 @@ structure GameLevel where
   image : String := default
 deriving Inhabited, Repr
 
+structure WorldOverview where
+  world: Name
+  tactics: Array InventoryTile := default
+  definitions: Array InventoryTile := default
+  lemmas: Array InventoryTile := default
+  deriving FromJson, ToJson, Inhabited, Repr
+
 /-- Json-encodable version of `GameLevel`
 Fields:
 - description: Lemma in mathematical language.
diff --git a/server/GameServer/Game.lean b/server/GameServer/Game.lean
index fb59fdb1..06c546ef 100644
--- a/server/GameServer/Game.lean
+++ b/server/GameServer/Game.lean
@@ -93,6 +93,54 @@ partial def handleServerEvent (ev : ServerEvent) : GameServerM Bool := do
         fw.stdin.writeLspMessage msg
 
       return true
+    | Message.request id "loadInventoryOverview" _ =>
+      let s ← get
+      let some game ← getGame? s.game
+        | return false
+
+      let mut overview : Array WorldOverview := #[]
+      for ⟨worldId, world⟩ in game.worlds.nodes.toList do
+        let mut tactics : Array InventoryTile := #[]
+        let mut theorems : Array InventoryTile := #[]
+        let mut definitions : Array InventoryTile := #[]
+        for ⟨_levelId, lvl⟩ in world.levels.toList do
+          tactics := tactics ++ lvl.tactics.tiles.filterMap (fun tile => match tile.new with
+            | true => some {tile with new := false, locked := true, disabled := false}
+            | false => none)
+          theorems := theorems ++ lvl.lemmas.tiles.filterMap (fun tile => match tile.new with
+            | true => some {tile with new := false, locked := true, disabled := false}
+            | false => none)
+          definitions := definitions ++ lvl.definitions.tiles.filterMap (fun tile => match tile.new with
+            | true => some {tile with new := false, locked := true, disabled := false}
+            | false => none)
+        overview := overview.push {
+          world := worldId,
+          tactics := tactics,
+          lemmas := theorems,
+          definitions := definitions }
+      let c ← read
+      c.hOut.writeLspResponse ⟨id, ToJson.toJson overview⟩
+      return true
+      -- -- All Levels have the same tiles, so we just load them from level 1 of an arbitrary world
+      -- -- and reset `new`, `disabled` and `unlocked`.
+      -- -- Note: as we allow worlds without any levels (for developing), we might need
+      -- -- to try until we find the first world with levels.
+      -- for ⟨worldId, _⟩ in game.worlds.nodes.toList do
+      --   let some lvl ← getLevel? {game := s.game, world := worldId, level := 1}
+      --     | do continue
+      --   let inventory : InventoryOverview := {
+      --     tactics := lvl.tactics.tiles.map
+      --       ({ · with locked := true, disabled := false, new := false }),
+      --     lemmas := lvl.lemmas.tiles.map
+      --       ({ · with locked := true, disabled := false, new := false }),
+      --     definitions := lvl.definitions.tiles.map
+      --       ({ · with locked := true, disabled := false, new := false }),
+      --     lemmaTab := none
+      --   }
+      --   let c ← read
+      --   c.hOut.writeLspResponse ⟨id, ToJson.toJson inventory⟩
+      --   return true
+      -- return false
     | _ => return false
   | _ => return false