diff --git a/map-generator/README.md b/map-generator/README.md
index 5efd142d8..d0d254cb1 100644
--- a/map-generator/README.md
+++ b/map-generator/README.md
@@ -96,11 +96,10 @@ Pure black pixels (`#000000` / `rgb(0, 0, 0)` with alpha ≥ 20) are encoded as
 
 Use impassable terrain to carve out non-rectangular map shapes or to create barriers that divide regions without water.
 
-In-Game, terrain is rendered using themes. The color of a tile is determined dynamically based on
-its **Terrain Type** and **Magnitude**. Theme Files:
+In-Game, the color of a tile is determined dynamically based on its **Terrain Type** and **Magnitude**.
 
-- `../src/core/configuration/PastelTheme.ts` (Light)
-- `../src/core/configuration/PastelThemeDark.ts` (Dark).
+- Ocean default color definition: `../src/client/render/gl/render-settings.json` (user changeable via settings)
+- Terrain color calculations: `../src/client/render/gl/utils/ColorUtils.ts#L50`
 
 ## Create info.json
 
diff --git a/src/client/ClientGameRunner.ts b/src/client/ClientGameRunner.ts
index d6c3f7a32..d561c0e88 100644
--- a/src/client/ClientGameRunner.ts
+++ b/src/client/ClientGameRunner.ts
@@ -72,6 +72,7 @@ import {
   deepAssign,
   MapRenderer,
   preloadAtlasData,
+  renderDpr,
   type RenderSettings,
 } from "./render/gl";
 import { ALL_UNIT_TYPES, UnitState } from "./render/types";
@@ -352,7 +353,7 @@ function mountWebGLFrameLoop(
 
   const syncCamera = (): void => {
     const scale = transformHandler.scale;
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     const centerX =
       transformHandler.offsetX +
       mapWidth / 2 +
diff --git a/src/client/UsernameInput.ts b/src/client/UsernameInput.ts
index ccc68437d..3867c51ae 100644
--- a/src/client/UsernameInput.ts
+++ b/src/client/UsernameInput.ts
@@ -27,6 +27,9 @@ export class UsernameInput extends LitElement {
   @state() private baseUsername: string = "";
   @state() private clanTag: string = "";
 
+  // Clans aren't supported on CrazyGames — hide the tag input and never submit one.
+  private readonly onCrazyGames = crazyGamesSDK.isOnCrazyGames();
+
   @property({ type: String }) validationError: string = "";
   // Ownership-check feedback (i18n key) shown inline beneath the tag input. Only
   // "not a member" gates the buttons (see emitValidity); the rest is advisory.
@@ -124,7 +127,9 @@ export class UsernameInput extends LitElement {
   private loadStoredUsername() {
     const storedUsername = localStorage.getItem(usernameKey);
     if (storedUsername) {
-      this.clanTag = localStorage.getItem(clanTagKey) ?? "";
+      if (!this.onCrazyGames) {
+        this.clanTag = localStorage.getItem(clanTagKey) ?? "";
+      }
       this.baseUsername = storedUsername;
       this.validateAndStore();
       this.startClanCheck();
@@ -137,7 +142,7 @@ export class UsernameInput extends LitElement {
   render() {
     return html`
       <div class="flex items-center w-full h-full gap-2">
-        <div class="relative flex items-center shrink-0">
+        <div class="no-crazygames relative flex items-center shrink-0">
           <input
             type="text"
             .value=${this.clanTag}
@@ -276,7 +281,9 @@ export class UsernameInput extends LitElement {
     this._isValid = result.isValid;
     if (result.isValid) {
       localStorage.setItem(usernameKey, trimmedBase);
-      localStorage.setItem(clanTagKey, this.getClanTag() ?? "");
+      if (!this.onCrazyGames) {
+        localStorage.setItem(clanTagKey, this.getClanTag() ?? "");
+      }
       this.validationError = "";
     } else {
       this.validationError = result.error ?? "";
diff --git a/src/client/controllers/BuildPreviewController.ts b/src/client/controllers/BuildPreviewController.ts
index f79f98802..cba6cb397 100644
--- a/src/client/controllers/BuildPreviewController.ts
+++ b/src/client/controllers/BuildPreviewController.ts
@@ -43,15 +43,21 @@ export function shouldPreserveGhostAfterBuild(unitType: UnitType): boolean {
 
 /**
  * Whether a SAM belongs in the nuke trajectory preview's threat set.
- * Allied SAMs are excluded unless the strike would betray that ally —
- * the alliance breaks at launch, so their SAMs will engage the nuke.
+ * Mirrors SAMLauncherExecution: a SAM ignores a nuke whose owner it's
+ * friendly with (same team OR allied).
+ * Teammates are excluded unconditionally — a strike can break an alliance
+ * but never a team relationship, so a teammate's SAM never engages.
+ * Allied SAMs are excluded unless the strike would betray that ally — the
+ * alliance breaks at launch, so their SAMs will engage the nuke.
  * (Own SAMs never threaten; the caller filters those out first.)
  */
 export function samThreatensNukePreview(
   samOwnerSmallId: number,
+  teammateSmallIds: ReadonlySet<number>,
   allySmallIds: ReadonlySet<number>,
   betrayedSmallIds: ReadonlySet<number>,
 ): boolean {
+  if (teammateSmallIds.has(samOwnerSmallId)) return false;
   return (
     !allySmallIds.has(samOwnerSmallId) || betrayedSmallIds.has(samOwnerSmallId)
   );
@@ -339,10 +345,15 @@ export class BuildPreviewController implements Controller {
     const srcX = this.game.x(bestSilo.tile());
     const srcY = this.game.y(bestSilo.tile());
 
-    // Non-allied SAMs threaten the trajectory; own + allied SAMs don't —
-    // except allies this strike would betray: the alliance breaks at launch
-    // (NukeExecution.maybeBreakAlliances), so their SAMs will intercept.
+    // Non-friendly SAMs threaten the trajectory; own + teammate + allied SAMs
+    // don't — except allies this strike would betray: the alliance breaks at
+    // launch (NukeExecution.maybeBreakAlliances), so their SAMs will intercept.
+    // Teammates have no such exception (a strike never breaks a team).
     // listNukeBreakAlliance is the same function the sim uses there.
+    const teammateIds = new Set<number>();
+    for (const p of this.game.players()) {
+      if (myPlayer.isOnSameTeam(p)) teammateIds.add(p.smallID());
+    }
     const allyIds = new Set<number>();
     for (const a of myPlayer.allies()) allyIds.add(a.smallID());
     const betrayedIds: ReadonlySet<number> =
@@ -359,7 +370,14 @@ export class BuildPreviewController implements Controller {
       if (!s.isActive()) continue;
       const owner = s.owner();
       if (owner === myPlayer) continue;
-      if (!samThreatensNukePreview(owner.smallID(), allyIds, betrayedIds)) {
+      if (
+        !samThreatensNukePreview(
+          owner.smallID(),
+          teammateIds,
+          allyIds,
+          betrayedIds,
+        )
+      ) {
         continue;
       }
       const r = this.game.config().samRange(s.level());
diff --git a/src/client/render/gl/Camera.ts b/src/client/render/gl/Camera.ts
index 1bd4cbf8d..7b2c4abb7 100644
--- a/src/client/render/gl/Camera.ts
+++ b/src/client/render/gl/Camera.ts
@@ -15,6 +15,8 @@
  *   ty = -offsetY * sy
  */
 
+import { renderDpr } from "./utils/Dpr";
+
 const MIN_ZOOM = 0.2;
 const MAX_ZOOM = 20;
 const DBLCLICK_MIN_ZOOM = 0.7;
@@ -44,7 +46,7 @@ export class Camera {
 
   /** Update canvas pixel dimensions. Triggers initial fitMap on first call. */
   resize(cssWidth: number, cssHeight: number): void {
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     this.canvasW = Math.round(cssWidth * dpr);
     this.canvasH = Math.round(cssHeight * dpr);
     if (this.needsInitialFit) {
@@ -163,7 +165,7 @@ export class Camera {
 
   /** Convert screen pixel position to world coordinates. */
   screenToWorld(screenX: number, screenY: number): { x: number; y: number } {
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     const ndcX = ((screenX * dpr) / this.canvasW) * 2 - 1;
     const ndcY = -(((screenY * dpr) / this.canvasH) * 2 - 1);
     const sx = (this.zoom * 2) / this.canvasW;
@@ -176,7 +178,7 @@ export class Camera {
 
   /** Convert world coordinates to screen pixel position (CSS pixels). */
   worldToScreen(worldX: number, worldY: number): { x: number; y: number } {
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     return {
       x: (this.zoom * (worldX - this.offsetX)) / dpr + this.canvasW / (2 * dpr),
       y: (this.zoom * (worldY - this.offsetY)) / dpr + this.canvasH / (2 * dpr),
diff --git a/src/client/render/gl/Renderer.ts b/src/client/render/gl/Renderer.ts
index 87a504998..5d01e518e 100644
--- a/src/client/render/gl/Renderer.ts
+++ b/src/client/render/gl/Renderer.ts
@@ -60,6 +60,7 @@ import { WorldTextPass } from "./passes/WorldTextPass";
 import type { RenderSettings } from "./RenderSettings";
 import { AffiliationPalette } from "./utils/Affiliation";
 import { getPaletteSize, hexToRgb } from "./utils/ColorUtils";
+import { renderDpr } from "./utils/Dpr";
 import {
   createTexture2D,
   toScreen,
@@ -569,7 +570,7 @@ export class GPURenderer {
   // ---------------------------------------------------------------------------
 
   resize(cssWidth: number, cssHeight: number): void {
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     this.canvas.width = Math.round(cssWidth * dpr);
     this.canvas.height = Math.round(cssHeight * dpr);
     this.camera.resize(cssWidth, cssHeight);
diff --git a/src/client/render/gl/index.ts b/src/client/render/gl/index.ts
index de14f07ff..f5de04d10 100644
--- a/src/client/render/gl/index.ts
+++ b/src/client/render/gl/index.ts
@@ -11,6 +11,7 @@ export { createRenderSettings, dumpSettings } from "./RenderSettings";
 export type { RenderSettings } from "./RenderSettings";
 export { deepAssign, deepDiff } from "./SettingsUtils";
 export { buildTerrainRGBA, getPaletteSize } from "./utils/ColorUtils";
+export { renderDpr } from "./utils/Dpr";
 export { buildNukeTrajectory, samRange } from "./utils/NukeTrajectory";
 export type { SAMInfo } from "./utils/NukeTrajectory";
 
diff --git a/src/client/render/gl/passes/TerrainPass.ts b/src/client/render/gl/passes/TerrainPass.ts
index 1df627b8c..9e1050c3d 100644
--- a/src/client/render/gl/passes/TerrainPass.ts
+++ b/src/client/render/gl/passes/TerrainPass.ts
@@ -91,6 +91,9 @@ export class TerrainPass {
    * nuke). `bytes[i]` is the new terrain byte for `refs[i]` (parallel arrays).
    * One 1×1 texSubImage2D per ref — fine for the small bursts a single nuke
    * produces.
+   *
+   * Also writes back into `terrainBytes` so a later full re-upload (e.g.
+   * setOceanColor) reflects these conversions instead of reverting them.
    */
   applyTerrainDelta(refs: readonly number[], bytes: Uint8Array): void {
     if (refs.length === 0) return;
@@ -101,6 +104,7 @@ export class TerrainPass {
       const ref = refs[i];
       const x = ref % this.mapW;
       const y = (ref - x) / this.mapW;
+      this.terrainBytes[ref] = bytes[i];
       encodeTerrainTile(bytes[i], this.pixelScratch, 0, this.oceanColor);
       gl.texSubImage2D(
         gl.TEXTURE_2D,
diff --git a/src/client/render/gl/passes/WorldTextPass.ts b/src/client/render/gl/passes/WorldTextPass.ts
index 0a6b43540..6227f69e9 100644
--- a/src/client/render/gl/passes/WorldTextPass.ts
+++ b/src/client/render/gl/passes/WorldTextPass.ts
@@ -10,6 +10,7 @@
 import type { Config } from "../../../../core/configuration/Config";
 import type { BonusEvent, ConquestFx } from "../../types";
 import type { RenderSettings } from "../RenderSettings";
+import { renderDpr } from "../utils/Dpr";
 import { createProgram } from "../utils/GlUtils";
 import type { GlyphTables } from "./name-pass/AtlasData";
 import { buildGlyphTables, parseAtlasData } from "./name-pass/AtlasData";
@@ -399,7 +400,7 @@ export class WorldTextPass {
     let count = 0;
     // canvasW in Camera is cssWidth*dpr, so `zoom` is device-px-per-world-unit.
     // Multiply screen-relative scales by dpr to keep a constant CSS-pixel size.
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
 
     for (const popup of this.active) {
       const elapsed = now - popup.startMs;
@@ -541,7 +542,7 @@ export class WorldTextPass {
     gl.useProgram(this.program);
     gl.uniformMatrix3fv(this.uCamera, false, cameraMatrix);
     gl.uniform1f(this.uZoom, zoom);
-    const dpr = window.devicePixelRatio || 1;
+    const dpr = renderDpr();
     gl.uniform1f(
       this.uMinScreenScale,
       this.settings.bonusPopup.minScreenScale * dpr,
diff --git a/src/client/render/gl/utils/Dpr.ts b/src/client/render/gl/utils/Dpr.ts
new file mode 100644
index 000000000..ccad4f8f9
--- /dev/null
+++ b/src/client/render/gl/utils/Dpr.ts
@@ -0,0 +1,13 @@
+/**
+ * Device-pixel-ratio used by the WebGL renderer for its backing store and all
+ * screen↔world math. Capped at 2 to avoid rendering at 3x on very high-DPI
+ * (mobile) displays, which costs ~9x the fragment work of 1x for a marginal
+ * visual gain over 2x.
+ *
+ * Every renderer call site that previously read `window.devicePixelRatio`
+ * must go through this so the canvas size, camera math, and text scaling stay
+ * on the same coordinate system.
+ */
+export function renderDpr(): number {
+  return Math.min(window.devicePixelRatio || 2, 2);
+}
diff --git a/tests/client/controllers/BuildPreviewController.test.ts b/tests/client/controllers/BuildPreviewController.test.ts
index b0d475b63..267997cb4 100644
--- a/tests/client/controllers/BuildPreviewController.test.ts
+++ b/tests/client/controllers/BuildPreviewController.test.ts
@@ -35,21 +35,40 @@ describe("BuildPreviewController ghost preservation (locked nuke / Enter confirm
 });
 
 describe("samThreatensNukePreview (nuke trajectory threat set, #4226)", () => {
+  const teammates = new Set([7, 8]);
   const allies = new Set([2, 3]);
 
-  test("non-allied SAM threatens the trajectory", () => {
-    expect(samThreatensNukePreview(5, allies, new Set())).toBe(true);
+  test("non-friendly SAM threatens the trajectory", () => {
+    expect(samThreatensNukePreview(5, teammates, allies, new Set())).toBe(true);
   });
 
   test("allied SAM does not threaten when the strike breaks no alliance", () => {
-    expect(samThreatensNukePreview(2, allies, new Set())).toBe(false);
+    expect(samThreatensNukePreview(2, teammates, allies, new Set())).toBe(
+      false,
+    );
   });
 
   test("would-be-betrayed ally's SAM threatens (alliance breaks at launch)", () => {
-    expect(samThreatensNukePreview(2, allies, new Set([2]))).toBe(true);
+    expect(samThreatensNukePreview(2, teammates, allies, new Set([2]))).toBe(
+      true,
+    );
   });
 
   test("other allies' SAMs still excluded when a different ally is betrayed", () => {
-    expect(samThreatensNukePreview(3, allies, new Set([2]))).toBe(false);
+    expect(samThreatensNukePreview(3, teammates, allies, new Set([2]))).toBe(
+      false,
+    );
+  });
+
+  test("teammate SAM does not threaten the trajectory", () => {
+    expect(samThreatensNukePreview(7, teammates, new Set(), new Set())).toBe(
+      false,
+    );
+  });
+
+  test("teammate SAM stays excluded even if listed as betrayed (a strike never breaks a team)", () => {
+    expect(
+      samThreatensNukePreview(7, teammates, new Set([7]), new Set([7])),
+    ).toBe(false);
   });
 });