diff --git a/src/lib/server/ably-server.ts b/src/lib/server/ably-server.ts
index 4baa34b..665c5aa 100644
--- a/src/lib/server/ably-server.ts
+++ b/src/lib/server/ably-server.ts
@@ -62,3 +62,19 @@ export async function moveRoom(
       svgRef: room.svgRef,
     });
 }
+
+export async function unclaimRooms(
+  gameId: number,
+  rooms: { roomId: bigint; svgRef: bigint }[],
+) {
+  await prisma.claimedRoom.deleteMany({
+    where: {
+      gameId,
+      roomId: { in: rooms.map((room) => Number(room.roomId)) },
+    },
+  });
+  ablyServer.channels.get("game:" + gameId + ":positions").publish(
+    "unclaim",
+    rooms.map((room) => room.svgRef),
+  );
+}
diff --git a/src/routes/game/[gameId=id]/+page.svelte b/src/routes/game/[gameId=id]/+page.svelte
index b059753..564b9f2 100644
--- a/src/routes/game/[gameId=id]/+page.svelte
+++ b/src/routes/game/[gameId=id]/+page.svelte
@@ -24,7 +24,13 @@
         currSvgRef: $positionsMessage.data.svgRef,
       };
     }
-    movePlayer($positionsMessage.data.userId, $positionsMessage.data.svgRef);
+    const svgRef = $positionsMessage.data.svgRef;
+    if (!data.claimedRooms.includes(svgRef)) {
+      data.claimedRooms.push(svgRef);
+      const pointIcon = map.getElmWhere("point", svgRef) as SVGImageElement;
+      if (pointIcon) map.removeIcon(pointIcon);
+    }
+    movePlayer($positionsMessage.data.userId, svgRef);
   }
   const playerMessage = getChannel(
     "player:" + $page.params.gameId + ":" + data.userId,
@@ -36,11 +42,6 @@
 
   function movePlayer(userId: number, svgRef: number) {
     data.players[userId].currSvgRef = svgRef;
-    if (!data.claimedRooms.includes(svgRef)) {
-      data.claimedRooms.push(svgRef);
-      const pointIcon = map.getElmWhere("point", svgRef) as SVGImageElement;
-      if (pointIcon) map.removeIcon(pointIcon);
-    }
     // A position update could occur before the map has finished loading.
     // This is common for the player's own position after they answer a question
     // since they are redirected to this page before the new position is published
diff --git a/src/routes/game/[gameId=id]/shop/[itemId=id]/buy/+server.ts b/src/routes/game/[gameId=id]/shop/[itemId=id]/buy/+server.ts
index 0aa081f..a30f7d1 100644
--- a/src/routes/game/[gameId=id]/shop/[itemId=id]/buy/+server.ts
+++ b/src/routes/game/[gameId=id]/shop/[itemId=id]/buy/+server.ts
@@ -1,6 +1,10 @@
 import { error } from "@sveltejs/kit";
 import prisma from "$lib/server/prisma";
-import { moveRoom, updateRealtimePoints } from "$lib/server/ably-server";
+import {
+  moveRoom,
+  unclaimRooms,
+  updateRealtimePoints,
+} from "$lib/server/ably-server";
 import type { User } from "@prisma/client";
 
 type ActionDetails = {
@@ -101,6 +105,7 @@ const ACTIONS: { [key: string]: (details: ActionDetails) => Promise<void> } = {
     );
   },
 
+  // actionParams is an integer number of points to subtract
   subtractRandPlayerPoints: async ({ playerId, gameId, actionParams }) => {
     const randPlayers: {
       id: bigint;
@@ -122,6 +127,33 @@ const ACTIONS: { [key: string]: (details: ActionDetails) => Promise<void> } = {
     });
     updateRealtimePoints(gameId, Number(randPlayer.userId), newPoints);
   },
+
+  // actionParams is an integer number of rooms (e.g: "5" -> unclaim 5 rooms)
+  unclaimAbsoluteRooms: async ({ gameId, actionParams }) => {
+    const rooms: { roomId: bigint; svgRef: bigint }[] = await prisma.$queryRaw`
+        SELECT roomId
+        FROM ClaimedRoom
+        WHERE gameId = ${gameId}
+        ORDER BY rand()
+        LIMIT ${+actionParams}`;
+    if (rooms.length === 0) error(400, "No rooms available to unclaim!");
+    await unclaimRooms(gameId, rooms);
+  },
+
+  // actionParams is a float percentage (e.g: "50" -> unclaim 50% of rooms)
+  unclaimPercentageRooms: async ({ gameId, actionParams }) => {
+    const rooms: { roomId: bigint; svgRef: bigint }[] = await prisma.$queryRaw`
+        SELECT roomId
+        FROM ClaimedRoom
+        WHERE gameId = ${gameId}
+        ORDER BY rand()`;
+    if (rooms.length === 0) error(400, "No rooms available to unclaim!");
+    // MySQL doesn't support dynamic limits, so need to limit from Javascript
+    await unclaimRooms(
+      gameId,
+      rooms.slice(0, (rooms.length * +actionParams) / 100),
+    );
+  },
 };
 
 export const GET = async ({ params, locals }) => {