diff --git a/source/lib/alignment.h b/source/lib/alignment.h
index cbb9ec31b6..2f5b65c974 100644
--- a/source/lib/alignment.h
+++ b/source/lib/alignment.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -64,8 +64,7 @@ static const size_t vectorSize = 16;
 	ASSERT(IsAligned(size, vectorSize))
 
 #define ASSERT_VECTOR_ALIGNED(pointer)\
-	ASSERT_VECTOR_MULTIPLE(pointer);\
-	ASSUME_ALIGNED(pointer, vectorSize)
+	ASSERT_VECTOR_MULTIPLE(pointer)
 
 
 //
diff --git a/source/lib/allocators/allocator_policies.h b/source/lib/allocators/allocator_policies.h
index 60b80f3cea..92b9bd2c76 100644
--- a/source/lib/allocators/allocator_policies.h
+++ b/source/lib/allocators/allocator_policies.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2020 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -83,7 +83,7 @@ struct Growth_Exponential
 // allocators such as Arena append variable-sized intervals).
 //
 // we don't store smart pointers because storage usually doesn't need
-// to be copied, and ICC 11 sometimes wasn't able to inline Address().
+// to be copied.
 struct Storage
 {
 	// @return starting address (alignment depends on the allocator).
diff --git a/source/lib/byte_order.h b/source/lib/byte_order.h
index 15c174f003..7f25d0cf36 100644
--- a/source/lib/byte_order.h
+++ b/source/lib/byte_order.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2022 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -127,10 +127,7 @@ i64 movsx_le64(const u8* p, size_t size);
 i64 movsx_be64(const u8* p, size_t size);
 
 
-#if ICC_VERSION
-#define swap32 _bswap
-#define swap64 _bswap64
-#elif MSC_VERSION
+#if MSC_VERSION
 extern unsigned short _byteswap_ushort(unsigned short);
 extern unsigned long _byteswap_ulong(unsigned long);
 extern unsigned __int64 _byteswap_uint64(unsigned __int64);
diff --git a/source/lib/code_annotation.h b/source/lib/code_annotation.h
index a17ae7271c..00990244df 100644
--- a/source/lib/code_annotation.h
+++ b/source/lib/code_annotation.h
@@ -50,10 +50,6 @@
  **/
 #if HAVE_C99 && GCC_VERSION	// _Pragma from C99, unused from GCC
 # define UNUSED2(param) _Pragma("unused " #param)
-#elif ICC_VERSION
-// ICC 12 still doesn't recognize pragma unused, casting to void
-// isn't sufficient, and self-assignment doesn't work for references.
-# define UNUSED2(param) do{ if(&param) {} } while(false)
 #else
 # define UNUSED2(param) ((void)(param))
 #endif
@@ -142,7 +138,7 @@ inline void ignore_result(const T&) {}
 // compiler-specific backend for UNREACHABLE.
 // #define it to nothing if the compiler doesn't support such a hint.
 #define HAVE_ASSUME_UNREACHABLE 1
-#if MSC_VERSION && !ICC_VERSION // (ICC ignores this)
+#if MSC_VERSION
 # define ASSUME_UNREACHABLE __assume(0)
 #elif GCC_VERSION
 # define ASSUME_UNREACHABLE __builtin_unreachable()
@@ -158,14 +154,12 @@ inline void ignore_result(const T&) {}
 #if HAVE_ASSUME_UNREACHABLE && !CONFIG_ENABLE_CHECKS
 # define UNREACHABLE ASSUME_UNREACHABLE
 // otherwise (or if CONFIG_ENABLE_CHECKS is set), add a user-visible
-// warning if the code is reached. note that abort() fails to stop
-// ICC from warning about the lack of a return statement, so we
-// use an infinite loop instead.
+// warning if the code is reached.
 #else
 # define UNREACHABLE\
 	STMT(\
 		DEBUG_WARN_ERR(ERR::LOGIC);	/* hit supposedly unreachable code */\
-		for(;;){};\
+		abort();\
 	)
 #endif
 
@@ -222,9 +216,6 @@ switch(x % 2)
  * };
  * @endcode
  *
- * This is preferable to inheritance from boost::noncopyable because it avoids
- * ICC 11 W4 warnings about non-virtual dtors and suppression of the copy
- * assignment operator.
  */
 #define NONCOPYABLE(className) \
 	className(const className&) = delete; \
@@ -238,12 +229,6 @@ switch(x % 2)
 	className(className&&) = default; \
 	className& operator=(className&&) = default
 
-#if ICC_VERSION
-# define ASSUME_ALIGNED(ptr, multiple) __assume_aligned(ptr, multiple)
-#else
-# define ASSUME_ALIGNED(ptr, multiple)
-#endif
-
 // annotate printf-style functions for compile-time type checking.
 // fmtpos is the index of the format argument, counting from 1 or
 // (if it's a non-static class function) 2; the '...' is assumed
@@ -271,9 +256,7 @@ switch(x % 2)
 /**
  * prevent the compiler from reordering loads or stores across this point.
  **/
-#if ICC_VERSION
-# define COMPILER_FENCE __memory_barrier()
-#elif MSC_VERSION
+#if MSC_VERSION
 # include <intrin.h>
 # pragma intrinsic(_ReadWriteBarrier)
 # define COMPILER_FENCE _ReadWriteBarrier()
@@ -322,14 +305,6 @@ switch(x % 2)
 // .. VC8 provides __restrict
 #elif MSC_VERSION
 # define RESTRICT __restrict
-// .. ICC supports the keyword 'restrict' when run with the /Qrestrict option,
-//    but it always also supports __restrict__ or __restrict to be compatible
-//    with GCC/MSVC, so we'll use the underscored version. One of {GCC,MSC}_VERSION
-//    should have been defined in addition to ICC_VERSION, so we should be using
-//    one of the above cases (unless it's an old VS7.1-emulating ICC).
-#elif ICC_VERSION
-# error ICC_VERSION defined without either GCC_VERSION or an adequate MSC_VERSION
-// .. unsupported; remove it from code
 #else
 # define RESTRICT
 #endif
diff --git a/source/lib/external_libraries/dbghelp.h b/source/lib/external_libraries/dbghelp.h
index bc34e085e8..818a1ed545 100644
--- a/source/lib/external_libraries/dbghelp.h
+++ b/source/lib/external_libraries/dbghelp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2010 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -113,14 +113,6 @@ enum DataKind
 
 //-----------------------------------------------------------------------------
 
-#if ICC_VERSION
-# pragma warning(push)
-# pragma warning(disable:94)	// the size of an array must be greater than zero
-# pragma warning(disable:271)	// trailing comma is nonstandard
-# pragma warning(disable:418)	// declaration requires a typedef name
-# pragma warning(disable:791)	// calling convention specified more than once
-#endif
-
 #pragma pack(push, 8)	// seems to be required
 
 #define _NO_CVCONST_H	// request SymTagEnum be defined
@@ -128,11 +120,6 @@ enum DataKind
 
 #pragma pack(pop)
 
-#if ICC_VERSION
-# pragma warning(pop)
-#endif
-
-
 //-----------------------------------------------------------------------------
 
 // rationale: Debugging Tools For Windows includes newer header/lib files,
diff --git a/source/lib/external_libraries/suppress_boost_warnings.h b/source/lib/external_libraries/suppress_boost_warnings.h
index 8482d73f39..e75e755f5f 100644
--- a/source/lib/external_libraries/suppress_boost_warnings.h
+++ b/source/lib/external_libraries/suppress_boost_warnings.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2020 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -24,7 +24,7 @@
 // raised when templates are instantiated (e.g. vfs_lookup.cpp),
 // so include this header from such source files as well.
 
-#include "lib/sysdep/compiler.h"	// ICC_VERSION
+#include "lib/sysdep/compiler.h"	// MSC_VERSION
 #include "lib/sysdep/arch.h"	// ARCH_IA32
 
 #if MSC_VERSION
@@ -41,19 +41,3 @@
 # pragma warning(disable:4514) // unreferenced inlined function has been removed
 # pragma warning(disable:4571) // Informational: catch(...) semantics changed since Visual C++ 7.1; structured exceptions (SEH) are no longer caught
 #endif
-#if ICC_VERSION
-# pragma warning(push)
-# pragma warning(disable:82)	// storage class is not first
-# pragma warning(disable:193)	// zero used for undefined preprocessing identifier
-# pragma warning(disable:304)	// access control not specified
-# pragma warning(disable:367)	// duplicate friend declaration
-# pragma warning(disable:444)	// destructor for base class is not virtual
-# pragma warning(disable:522)	// function redeclared inline after being called
-# pragma warning(disable:811)	// exception specification for implicitly declared virtual function is incompatible with that of overridden function
-# pragma warning(disable:1879)	// unimplemented pragma ignored
-# pragma warning(disable:2270)	// the declaration of the copy assignment operator has been suppressed
-# pragma warning(disable:2273)	// the declaration of the copy constructor has been suppressed
-# if ARCH_IA32
-#  pragma warning(disable:693)	// calling convention specified here is ignored
-# endif
-#endif
diff --git a/source/lib/pch/pch_warnings.h b/source/lib/pch/pch_warnings.h
index 8f457cc733..43d66e97fb 100644
--- a/source/lib/pch/pch_warnings.h
+++ b/source/lib/pch/pch_warnings.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2021 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -44,16 +44,6 @@
 # pragma warning(disable:6246)	// local declaration hides declaration of the same name in outer scope
 # pragma warning(disable:6326)	// potential comparison of a constant with another constant
 # pragma warning(disable:6334)	// sizeof operator applied to an expression with an operator might yield unexpected results
-// .. Intel-specific
-# if ICC_VERSION
-#  pragma warning(disable:383)	// value copied to temporary, reference to temporary used
-#  pragma warning(disable:981)	// operands are evaluated in unspecified order
-#  pragma warning(disable:1418)	// external function definition with no prior declaration (raised for all non-static function templates)
-#  pragma warning(disable:1572)	// floating-point equality and inequality comparisons are unreliable
-#  pragma warning(disable:1684)	// conversion from pointer to same-sized integral type
-#  pragma warning(disable:1786)	// function is deprecated (disabling 4996 isn't sufficient)
-#  pragma warning(disable:2415)	// variable of static storage duration was declared but never referenced (raised by Boost)
-# endif
 // .. disabled by default in W4, ENABLE them
 # pragma warning(default:4062)   // enumerator is not handled
 # pragma warning(default:4254)   // [bit field] conversion, possible loss of data
diff --git a/source/lib/precompiled.h b/source/lib/precompiled.h
index 9ef085a412..c889a8e4cf 100644
--- a/source/lib/precompiled.h
+++ b/source/lib/precompiled.h
@@ -54,11 +54,6 @@
 // (as soon as possible so that headers below are covered)
 #include "lib/pch/pch_warnings.h"
 
-#if ICC_VERSION
-#include <mathimf.h>	// (must come before <cmath> or <math.h> (replaces them))
-double __cdecl abs(double x);	// not declared by mathimf
-#endif
-
 
 //
 // headers made available everywhere for convenience
diff --git a/source/lib/sysdep/compiler.h b/source/lib/sysdep/compiler.h
index e14a32bc3c..0b0cfa9b4c 100644
--- a/source/lib/sysdep/compiler.h
+++ b/source/lib/sysdep/compiler.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2022 Wildfire Games.
+/* Copyright (c) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -29,19 +29,13 @@
 
 // detect compiler and its version (0 if not present, otherwise
 // major*100 + minor). note that more than one *_VERSION may be
-// non-zero due to interoperability (e.g. ICC with MSC).
+// non-zero due to interoperability.
 // .. VC
 #ifdef _MSC_VER
 # define MSC_VERSION _MSC_VER
 #else
 # define MSC_VERSION 0
 #endif
-// .. ICC (VC-compatible, GCC-compatible)
-#if defined(__INTEL_COMPILER)
-# define ICC_VERSION __INTEL_COMPILER
-#else
-# define ICC_VERSION 0
-#endif
 // .. LCC (Win32) and MCST LCC (E2K) compilers define same identifier (__LCC__)
 #if defined(__LCC__) && !defined(__MCST__)
 # define LCC_VERSION __LCC__
@@ -106,7 +100,7 @@
 #ifndef COMPILER_HAS_SSE
 # if GCC_VERSION && defined(__SSE__)
 #  define COMPILER_HAS_SSE 1
-# elif MSC_VERSION	// also includes ICC
+# elif MSC_VERSION
 #  define COMPILER_HAS_SSE 1
 # else
 #  define COMPILER_HAS_SSE 0
@@ -116,7 +110,7 @@
 #ifndef COMPILER_HAS_SSE2
 # if GCC_VERSION && defined(__SSE2__)
 #  define COMPILER_HAS_SSE2 1
-# elif MSC_VERSION	// also includes ICC
+# elif MSC_VERSION
 #  define COMPILER_HAS_SSE2 1
 # else
 #  define COMPILER_HAS_SSE2 0
diff --git a/source/lib/sysdep/os/win/wdll_main.h b/source/lib/sysdep/os/win/wdll_main.h
deleted file mode 100644
index 413c546bbd..0000000000
--- a/source/lib/sysdep/os/win/wdll_main.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* Copyright (C) 2015 Wildfire Games.
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-// for each project that builds a shared-library, include this "header" in
-// one source file that is on the linker command line.
-// (avoids the ICC remark "Main entry point was not seen")
-
-#if OS_WIN
-#include "lib/sysdep/os/win/win.h"
-
-BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD UNUSED(reason), LPVOID UNUSED(reserved))
-{
-	// avoid unnecessary DLL_THREAD_ATTACH/DETACH calls
-	// (ignore failure - happens if the DLL uses TLS)
-	(void)DisableThreadLibraryCalls(hInstance);
-	return TRUE;	// success (ignored unless reason == DLL_PROCESS_ATTACH)
-}
-
-#endif
diff --git a/source/lib/sysdep/os/win/wnuma.cpp b/source/lib/sysdep/os/win/wnuma.cpp
index 680cf07bef..cb5b58490f 100644
--- a/source/lib/sysdep/os/win/wnuma.cpp
+++ b/source/lib/sysdep/os/win/wnuma.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2024 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -384,7 +384,6 @@ static double MeasureRelativeDistance()
 {
 	const size_t size = 32*MiB;
 	void* mem = vm::Allocate(size);
-	ASSUME_ALIGNED(mem, pageSize);
 
 	const uintptr_t previousProcessorMask = os_cpu_SetThreadAffinityMask(os_cpu_ProcessorMask());
 
diff --git a/source/lib/sysdep/os/win/wposix/wposix_types.h b/source/lib/sysdep/os/win/wposix/wposix_types.h
index 70d40bbeb9..bfa7436f82 100644
--- a/source/lib/sysdep/os/win/wposix/wposix_types.h
+++ b/source/lib/sysdep/os/win/wposix/wposix_types.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2010 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -42,7 +42,7 @@ typedef short int16_t;
 typedef int int32_t;
 #endif
 
-#if MSC_VERSION || ICC_VERSION || LCC_VERSION
+#if MSC_VERSION || LCC_VERSION
 typedef __int64 int64_t;
 #else
 typedef long long int64_t;
@@ -51,7 +51,7 @@ typedef long long int64_t;
 typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 typedef unsigned int uint32_t;
-#if MSC_VERSION || ICC_VERSION || LCC_VERSION
+#if MSC_VERSION || LCC_VERSION
 typedef unsigned __int64 uint64_t;
 #else
 typedef unsigned long long uint64_t;
diff --git a/source/lib/sysdep/os/win/wversion.cpp b/source/lib/sysdep/os/win/wversion.cpp
index 5c6ebfbda4..158b9d5b7b 100644
--- a/source/lib/sysdep/os/win/wversion.cpp
+++ b/source/lib/sysdep/os/win/wversion.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2023 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -40,14 +40,7 @@ const char* wversion_Family()
 		UNUSED2(RegQueryValueExW(hKey, L"CurrentVersion", 0, 0, reinterpret_cast<LPBYTE>(windowsVersionString), &size));
 
 		unsigned major = 0, minor = 0;
-		// ICC 11.1.082 generates incorrect code for the following:
-		// const int ret = swscanf_s(windowsVersionString, L"%u.%u", &major, &minor);
-		std::wstringstream ss(windowsVersionString);
-		ss >> major;
-		wchar_t dot;
-		ss >> dot;
-		ENSURE(dot == '.');
-		ss >> minor;
+		swscanf_s(windowsVersionString, L"%u.%u", &major, &minor);
 
 		ENSURE(4 <= major && major <= 0xFF);
 		ENSURE(minor <= 0xFF);
diff --git a/source/lib/sysdep/stl.h b/source/lib/sysdep/stl.h
index 350984d2be..4b8d7ccd14 100644
--- a/source/lib/sysdep/stl.h
+++ b/source/lib/sysdep/stl.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2013 Wildfire Games.
+/* Copyright (C) 2025 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -49,12 +49,6 @@
 #else
 # define STL_GCC 0
 #endif
-// .. ICC
-#if defined(__INTEL_CXXLIB_ICC)
-# define STL_ICC __INTEL_CXXLIB_ICC
-#else
-# define STL_ICC 0
-#endif
 
 
 // disable (slow!) iterator checks in release builds (unless someone already defined this)
diff --git a/source/ps/GameSetup/HWDetect.cpp b/source/ps/GameSetup/HWDetect.cpp
index 14c2f6e6d8..40cbabec41 100644
--- a/source/ps/GameSetup/HWDetect.cpp
+++ b/source/ps/GameSetup/HWDetect.cpp
@@ -331,7 +331,6 @@ void RunHardwareDetection(bool writeSystemInfoBeforeDetection, Renderer::Backend
 	Script::SetProperty(rq, settings, "build_version", std::wstring(build_version));
 
 	Script::SetProperty(rq, settings, "build_msc", (int)MSC_VERSION);
-	Script::SetProperty(rq, settings, "build_icc", (int)ICC_VERSION);
 	Script::SetProperty(rq, settings, "build_gcc", (int)GCC_VERSION);
 	Script::SetProperty(rq, settings, "build_clang", (int)CLANG_VERSION);