Any CPU Ready Source Inspired by @Chicken-Bones

Standalone3.0/Steamworks.NET.csproj

@@ -0,0 +1,35 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFramework>net8.0</TargetFramework>
+		<RootNamespace>Steamworks</RootNamespace>
+		<RepositoryType>git</RepositoryType>
+		<DefineConstants>STEAMWORKS_LIN_OSX;STEAMWORKS_X64;STEAMWORKS_ANYCPU</DefineConstants>
+	</PropertyGroup>
+
+	<PropertyGroup Label="Nuget PM">
+		<GeneratePackageOnBuild>false</GeneratePackageOnBuild>
+		<!-- Once Any CPU get merged, remove next line to restore package ID to Steamworks.NET. -->
+		<PackageId>Steamworks.NET.AnyCPU</PackageId>
+		<Authors>rlabrecque</Authors>
+		<!--
+		Version is specified by build commandline, -p:Version=2025.8.18 
+		<PackageVersion>15.0.1</PackageVersion>
+		-->
+		<PackageLicenseExpression>MIT</PackageLicenseExpression>
+		<PackageProjectUrl>https://github.com/rlabrecque/Steamworks.NET</PackageProjectUrl>
+		<RepositoryUrl>https://github.com/rlabrecque/Steamworks.NET.git</RepositoryUrl>
+		<PackageReadmeFile>README.md</PackageReadmeFile>
+		<IncludeSymbols>true</IncludeSymbols>
+		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<Compile Include="../com.rlabrecque.steamworks.net/Runtime/**/*.cs" LinkBase="src" />
+	</ItemGroup>
+	<ItemGroup>
+	  <None Include="..\Standalone\README.md" Link="README-standalone.md" Pack="true" PackagePath="docs/README-standalone.md" />
+	  <None Include="..\README.md" Link="README.md" Pack="true" PackagePath="README.md" />
+	</ItemGroup>
+
+</Project>

Standalone3.0/Steamworks.NET.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29009.5
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Steamworks.NET", "Steamworks.NET.csproj", "{F34F403D-1D4D-4DC6-BBAE-DA31190EC88C}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F34F403D-1D4D-4DC6-BBAE-DA31190EC88C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F34F403D-1D4D-4DC6-BBAE-DA31190EC88C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F34F403D-1D4D-4DC6-BBAE-DA31190EC88C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F34F403D-1D4D-4DC6-BBAE-DA31190EC88C}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {EDFD04E1-5140-4A08-9F0B-3BE1A9B58AE6}
+	EndGlobalSection
+EndGlobal

com.rlabrecque.steamworks.net/Runtime/Steam.cs

@@ -1,4 +1,4 @@
-// This file is provided under The MIT License as part of Steamworks.NET.
+// This file is provided under The MIT License as part of Steamworks.NET.
 // Copyright (c) 2013-2022 Riley Labrecque
 // Please see the included LICENSE.txt for additional information.
 
@@ -56,6 +56,9 @@ public static class SteamAPI {
 		// Returns true on success
 		public static ESteamAPIInitResult InitEx(out string OutSteamErrMsg)
 		{
+#if STEAMWORKS_ANYCPU
+			BeAnyCPUCompatible();
+#endif
 			InteropHelp.TestIfPlatformSupported();
 
 			var pszInternalCheckInterfaceVersions = new System.Text.StringBuilder();
@@ -111,7 +114,43 @@ public static ESteamAPIInitResult InitEx(out string OutSteamErrMsg)
 			}
 		}
 
+#if STEAMWORKS_ANYCPU // implies .net core and STEAMWORKS_X86
+		private static void BeAnyCPUCompatible() {
+			if (s_isAnyCPUHookApplied)
+				return;
+
+			s_isAnyCPUHookApplied = true;
+			System.Runtime.Loader.AssemblyLoadContext.Default.ResolvingUnmanagedDll += SteamNativeResolveHook;
+		}
+
+		private static bool s_isAnyCPUHookApplied = false;
+
+		private static nint SteamNativeResolveHook(System.Reflection.Assembly requestAsm, string name) {
+			// check who is requesting steam native. only do loading tricks when we requesting steam native
+			if (requestAsm.GetName().Name != "Steamworks.NET") {
+				return 0;
+			}
+
+			// check is requesting library name matches steam native
+			if ((name == NativeMethods.NativeLibraryName || name == NativeMethods.NativeLibrary_SDKEncryptedAppTicket)
+				// check are we on win64, the special case we are going to handle
+				&& RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && System.Environment.Is64BitProcess) {
+
+				// platform specific suffix is not needed
+				string x64LibName = $"{name}64";
+				// we don't care failed load, let next handler manage it
+				NativeLibrary.TryLoad(x64LibName, requestAsm, null, out nint lib);
+				return lib;
+			}
+
+			return 0;
+		}
+#endif
+
 		public static bool Init() {
+#if STEAMWORKS_ANYCPU
+			BeAnyCPUCompatible();
+#endif
 			InteropHelp.TestIfPlatformSupported();
 
 			string SteamErrorMsg;