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PixelJunk-Extractor.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+    <RootNamespace>PixelJunk_Extractor</RootNamespace>
+  </PropertyGroup>
+
+</Project>

PixelJunk-Extractor.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.34407.143
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PixelJunk-Extractor", "PixelJunk-Extractor.csproj", "{B0258C13-FA28-4FD4-BF94-A440FA18F660}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B0258C13-FA28-4FD4-BF94-A440FA18F660}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B0258C13-FA28-4FD4-BF94-A440FA18F660}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B0258C13-FA28-4FD4-BF94-A440FA18F660}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B0258C13-FA28-4FD4-BF94-A440FA18F660}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {DC7C07EB-5779-46C6-A4C6-C692F5933451}
+	EndGlobalSection
+EndGlobal

Program.cs

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+using System.IO;
+using System.IO.Compression;
+
+namespace PixelJunk_Extractor
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            using FileStream pkiwin = File.OpenRead(args[0] + "//shooter.pkiwin");
+            BinaryReader br = new(pkiwin);
+            Directory.CreateDirectory(args[0] + "//shooter");
+            br.BaseStream.Position = 8;
+            SUBFILE[] subfiles = new SUBFILE[br.ReadInt32()];
+            for (int i = 0; i < subfiles.Length; i++)
+            {
+                subfiles[i].sizeUncompressed = br.ReadInt32();//unknown
+                subfiles[i].sizeCompressed = br.ReadInt32();
+                subfiles[i].offset = br.ReadInt32();
+                br.ReadInt32();//unknown
+            }
+            int n = 0;
+            using FileStream pkdwin = File.OpenRead(args[0] + "//shooter.pkdwin");
+            foreach (SUBFILE sub in subfiles)
+            {
+                br = new(pkdwin);
+                br.BaseStream.Position = sub.offset;
+                using FileStream FS = File.Create(args[0] + "//shooter//" + n);
+                BinaryWriter bw = new(FS);
+
+                MemoryStream ms = new();
+                br.ReadInt16();
+                using (var ds = new DeflateStream(new MemoryStream(br.ReadBytes(sub.sizeCompressed)), CompressionMode.Decompress))
+                    ds.CopyTo(ms);
+                br = new(ms);
+                br.BaseStream.Position = 0;
+                bw.Write(br.ReadBytes(sub.sizeUncompressed));
+                bw.Close();
+                n++;
+            }
+            br.Close();
+        }
+    }
+    struct SUBFILE
+    {
+        public int sizeUncompressed;
+        public int sizeCompressed;
+        public int offset;
+    }
+}