diff --git a/src/core/execution/SAMLauncherExecution.ts b/src/core/execution/SAMLauncherExecution.ts
index 328b69ee6..9e3c30e4c 100644
--- a/src/core/execution/SAMLauncherExecution.ts
+++ b/src/core/execution/SAMLauncherExecution.ts
@@ -13,9 +13,9 @@ import { PseudoRandom } from "../PseudoRandom";
 import { SAMMissileExecution } from "./SAMMissileExecution";
 
 export class SAMLauncherExecution implements Execution {
-  private player: Player;
-  private mg: Game;
-  private sam: Unit;
+  private player: Player | null = null;
+  private mg: Game | null = null;
+  private sam: Unit | null = null;
   private active: boolean = true;
 
   private target: Unit | null = null;
@@ -40,9 +40,12 @@ export class SAMLauncherExecution implements Execution {
   }
 
   tick(ticks: number): void {
-    if (this.sam == null) {
+    if (this.mg === null || this.player === null) {
+      throw new Error("Not initialized");
+    }
+    if (this.sam === null) {
       const spawnTile = this.player.canBuild(UnitType.SAMLauncher, this.tile);
-      if (spawnTile == false) {
+      if (spawnTile === false) {
         consolex.warn("cannot build SAM Launcher");
         this.active = false;
         return;
@@ -56,11 +59,11 @@ export class SAMLauncherExecution implements Execution {
       return;
     }
 
-    if (this.player != this.sam.owner()) {
+    if (this.player !== this.sam.owner()) {
       this.player = this.sam.owner();
     }
 
-    if (!this.pseudoRandom) {
+    if (this.pseudoRandom === null) {
       this.pseudoRandom = new PseudoRandom(this.sam.id());
     }
 
@@ -71,7 +74,8 @@ export class SAMLauncherExecution implements Execution {
       ])
       .filter(
         ({ unit }) =>
-          unit.owner() !== this.player && !this.player.isFriendly(unit.owner()),
+          unit.owner() !== this.player &&
+          !this.player?.isFriendly(unit.owner()),
       );
 
     this.target =
@@ -97,7 +101,7 @@ export class SAMLauncherExecution implements Execution {
 
     if (
       this.sam.isCooldown() &&
-      this.sam.ticksLeftInCooldown(this.mg.config().SAMCooldown()) == 0
+      this.sam.ticksLeftInCooldown(this.mg.config().SAMCooldown()) === 0
     ) {
       this.sam.setCooldown(false);
     }
@@ -106,7 +110,7 @@ export class SAMLauncherExecution implements Execution {
       this.sam.setCooldown(true);
       const random = this.pseudoRandom.next();
       let hit = true;
-      if (this.target.type() != UnitType.AtomBomb) {
+      if (this.target.type() !== UnitType.AtomBomb) {
         hit = random < this.mg.config().samHittingChance();
       }
       if (!hit) {