UE4LevelsInfo.cs

using MemUtil;
using System.Diagnostics;
using System.Globalization;

Console.Write("Enter the name of the game process: ");
string? procName = Console.ReadLine()?.Replace(".exe", "");

List<Process> procList = Process.GetProcesses().ToList().FindAll(x => x.ProcessName == procName);

if (procList.Count == 0)
{
	Console.WriteLine("Process not found!");
	Console.ReadKey();
	return;
}

Process game = procList[0];

var modules = game.ModulesWow64Safe();

var GetStaticPointerFromSig = (Func<string, int, IntPtr>)((signature, instructionOffset) =>
{
	var scanner = new SignatureScanner(game, modules.First().BaseAddress, (int)modules.First().ModuleMemorySize);
	var pattern = new SigScanTarget(signature);
	var location = scanner.Scan(pattern);
	if (location == IntPtr.Zero) return IntPtr.Zero;
	int offset = game.ReadValue<int>((IntPtr)location + instructionOffset);
	return (IntPtr)location + offset + instructionOffset + 0x4;
});

var FNamePool = GetStaticPointerFromSig("74 09 48 8D 15 ?? ?? ?? ?? EB 16", 0x5);
var UWorld = GetStaticPointerFromSig("0F 2E ?? 74 ?? 48 8B 1D ?? ?? ?? ?? 48 85 DB 74", 0x8);

var GetNameFromFName = (Func<long, string>)(longKey =>
{
	int key = (int)(longKey & uint.MaxValue);
	int partial = (int)(longKey >> 32);
	int chunkOffset = key >> 16;
	int nameOffset = (ushort)key;
	IntPtr namePoolChunk = game.ReadValue<IntPtr>((IntPtr)FNamePool + ((chunkOffset + 2) * 0x8));
	Int16 nameEntry = game.ReadValue<Int16>((IntPtr)namePoolChunk + (2 * nameOffset));
	int nameLength = nameEntry >> 6;
	string output = game.ReadString((IntPtr)namePoolChunk + (2 * nameOffset) + 2, nameLength);
	return (partial == 0) ? output : output + "_" + partial.ToString();
});

Console.Write("Enter \"Levels\" offset (in hex): ");
string? levelsOffsetString = Console.ReadLine()?.Replace("0x", "");
if(!int.TryParse(levelsOffsetString, System.Globalization.NumberStyles.HexNumber, CultureInfo.InvariantCulture, out int levelsOffset))
{
	Console.WriteLine("invalid input");
	Console.ReadKey();
	return;
}

Console.Write("Enter \"StreamingLevels\" offset (in hex): ");
string? streamingLevelsOffsetString = Console.ReadLine()?.Replace("0x", "");
if (!int.TryParse(streamingLevelsOffsetString, System.Globalization.NumberStyles.HexNumber, CultureInfo.InvariantCulture, out int streamingLevelsOffset))
{
	Console.WriteLine("invalid input");
	Console.ReadKey();
	return;
}

string persistentLevelName = GetNameFromFName(new DeepPointer(UWorld, 0x30, 0x20, 0x20, 0x18).Deref<long>(game));
Console.WriteLine("\nPersistent Level: " + persistentLevelName);

IntPtr levelsPtr = new DeepPointer(UWorld, levelsOffset).Deref<IntPtr>(game);
int levelsCount = new DeepPointer(UWorld, levelsOffset + 0x8).Deref<int>(game);
Console.WriteLine("\nLevel Array at \"{0}\" containing {1} entries.", levelsPtr.ToString("X16"), levelsCount);
for (int i = 1; i < levelsCount; i++)
{
	string levelName = GetNameFromFName(new DeepPointer(UWorld, levelsOffset, 0x8 * i, 0x20, 0x20, 0x18).Deref<long>(game));
	Console.WriteLine(levelName);
}

IntPtr streamingLevelsPtr = new DeepPointer(UWorld, streamingLevelsOffset).Deref<IntPtr>(game);
int streamingLevelsCount = new DeepPointer(UWorld, streamingLevelsOffset + 0x8).Deref<int>(game);
Console.WriteLine("\nStreaming Level Array at \"{0}\" containing {1} entries.", streamingLevelsPtr.ToString("X16"), streamingLevelsCount);
for (int i = 0; i < streamingLevelsCount; i++)
{
	string levelName = GetNameFromFName(new DeepPointer(UWorld, streamingLevelsOffset, 0x8 * i, 0x38).Deref<long>(game));
	levelName = levelName[..levelName.LastIndexOf('.')];
	Console.WriteLine(levelName);
}

Console.ReadKey();