A lot of things.

app/Http/Controllers/ModCP/PlatformController.php

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+<?php
+
+namespace App\Http\Controllers\ModCP;
+
+use App\Helpers\EntryHelpers;
+use App\Http\Controllers\Controller;
+use App\Models\Platform;
+use App\Models\Language;
+use App\Traits\ModCPSearch;
+use Illuminate\Http\Request;
+
+class PlatformController extends Controller
+{
+
+    use ModCPSearch;
+
+    public function index()
+    {
+        $items = Platform::withCount(['games','entries'])
+            ->orderBy('name')
+            ->tap(fn($query) => $this->applySearch($query, ['name']))
+            ->paginate(30)
+            ->withQueryString();
+
+        return view('modcp.resources', [
+            'items' => $items,
+            'title' => 'Platforms',
+            'singular' => 'Platform',
+            'storeRoute' => 'modcp.platforms.store',
+            'updateRoute' => 'modcp.platforms.update',
+            'destroyRoute' => 'modcp.platforms.destroy'
+        ]);
+    }
+
+    public function store(Request $request)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255|unique:platforms,name',
+        ]);
+
+        Platform::create([
+            'name' => trim($request->name),
+            'slug' => EntryHelpers::uniqueSlug( $request->name, Platform::class ),
+        ]);
+
+        return back()->with('success', 'Platform added.');
+    }
+
+    public function update(Request $request, Platform $platform)
+    {
+        $request->validate([
+            'name' => 'required|string|max:255|unique:platforms,name,' . $platform->id,
+        ]);
+
+        $platform->update([
+            'name' => trim($request->name),
+            'slug' => EntryHelpers::uniqueSlug( $request->name, Platform::class, $platform->id ),
+        ]);
+
+        return back()->with('success', 'Platform updated.');
+    }
+
+    public function destroy(Platform $platform)
+    {
+        $platform->delete();
+        return back()->with('success', 'Platform deleted.');
+    }
+}