diff --git a/rules.ini b/rules.ini
index 279d8dbd7..ecf3bd52b 100644
--- a/rules.ini
+++ b/rules.ini
@@ -22,7 +22,7 @@ RIM = \.rim$ ; BioWare
 RPF = \.rpf$ ; RAGE
 SCR = \.scr$ ; SCI
 SIERRA_EXE = (?:^|/)SIERRA\.EXE$ ; SCI
-SND_OGG = (?:^|/)snd?_.+\.ogg$ ; GameMaker
+SND_OGG = (?:^|/)snd?_\w+\.ogg$ ; GameMaker
 TAB = \.tab$ ; Apex Engine
 TGA = \.tga$ ; BioWare
 TLK = \.tlk$ ; BioWare
@@ -92,7 +92,7 @@ FPS_Creator = (?:^|/)Files/languagebank/english/textfiles/fpsc-050\.ini$
 Frostbite[] = (?:^|/)(?:Engine\.BuildInfo(?:_Win(?:64|32)_retail(?:_dll)?)?)\.dll$
 Frostbite[] = (?:^|/)Runtime_Win64_retail\.BuildSettings$
 GameBox = ^Nadeo\.ini$
-GameGuru = ^files/gamecore/projectiletypes/.+\.dds$
+GameGuru = ^files/gamecore/projectiletypes/[\w/]+\.dds$
 GameMaker[] = (?:^|/)game\.(?:unx|ios)$
 GameMaker[] = (?:^|/)libYoYoGamepad\.dylib$
 GameMaker[] = (?:^|/)audiogroup1\.dat$
diff --git a/tests/Test.php b/tests/Test.php
index 74a37eee8..ffd15fa7b 100644
--- a/tests/Test.php
+++ b/tests/Test.php
@@ -45,6 +45,13 @@
 			{
 				$FailingTests[] = "$Type.$Name: Regex \"$Regex\" contains a capturing group";
 			}
+
+			$RegexIssue = CheckRegexPerformance( $Regex );
+
+			if( $RegexIssue !== null )
+			{
+				$FailingTests[] = "$Type.$Name: Regex \"$Regex\" $RegexIssue";
+			}
 		}
 	}
 }
@@ -147,6 +154,35 @@ function RegexHasCapturingGroups( string $regex ) : bool
 	);
 }
 
+function CheckRegexPerformance( string $regex ) : ?string
+{
+	// Check for .+ or .*, skip if it's inside a character class like [.+]
+	if( preg_match( '/(?<!\[)\.[\+\*]/', $regex ) )
+	{
+		return 'uses .+ or .* which is inefficient';
+	}
+
+	// Patterns like (.+)+ or (a*)*
+	if( preg_match( '/\([^)]*[\+\*][^)]*\)[\+\*]/', $regex ) )
+	{
+		return 'has nested quantifiers';
+	}
+
+	// Quantifier applied to anchor
+	if( preg_match( '/[\^\$][\+\*\?]/', $regex ) )
+	{
+		return 'has quantifier on anchor';
+	}
+
+	// Empty alternation like (|foo) or (foo|)
+	if( preg_match( '/\(\||\|\)/', $regex ) )
+	{
+		return 'has empty alternation';
+	}
+
+	return null;
+}
+
 /**
  * @param array<string, string|string[]> $Rulesets
  */
diff --git a/tests/types/Engine.GameGuru.txt b/tests/types/Engine.GameGuru.txt
index ce6a2b35d..66070e7a1 100644
--- a/tests/types/Engine.GameGuru.txt
+++ b/tests/types/Engine.GameGuru.txt
@@ -1,13 +1,13 @@
-files/gamecore/projectiletypes/----.dds
-files/gamecore/projectiletypes/---.dds
-files/gamecore/projectiletypes/--.dds
-files/gamecore/projectiletypes/-.dds
-files/gamecore/projectiletypes/1.dds
-files/gamecore/projectiletypes/11.dds
-files/gamecore/projectiletypes/111.dds
-files/gamecore/projectiletypes/1111.dds
-files/gamecore/projectiletypes/@.dds
-files/gamecore/projectiletypes/@@.dds
+files/gamecore/projectiletypes/33.dds
+files/gamecore/projectiletypes/333.dds
+files/gamecore/projectiletypes/3333.dds
+files/gamecore/projectiletypes/5.dds
+files/gamecore/projectiletypes/55.dds
+files/gamecore/projectiletypes/555.dds
+files/gamecore/projectiletypes/5555.dds
+files/gamecore/projectiletypes/BB.dds
+files/gamecore/projectiletypes/BBB.dds
+files/gamecore/projectiletypes/BBBB.dds
 files/gamecore/projectiletypes/Z.dds
 files/gamecore/projectiletypes/ZZ.dds
 files/gamecore/projectiletypes/ZZZ.dds
diff --git a/tests/types/Evidence.SND_OGG.txt b/tests/types/Evidence.SND_OGG.txt
index be956de9b..0c5522cc6 100644
--- a/tests/types/Evidence.SND_OGG.txt
+++ b/tests/types/Evidence.SND_OGG.txt
@@ -1,13 +1,13 @@
-/sn_----.ogg
-/sn_---.ogg
-/sn_--.ogg
-/sn_-.ogg
-/sn_1.ogg
-/sn_11.ogg
-/sn_111.ogg
-/sn_1111.ogg
-/sn_@.ogg
-/sn_@@.ogg
+/sn_33.ogg
+/sn_333.ogg
+/sn_3333.ogg
+/sn_5.ogg
+/sn_55.ogg
+/sn_555.ogg
+/sn_5555.ogg
+/sn_BB.ogg
+/sn_BBB.ogg
+/sn_BBBB.ogg
 /sn_Z.ogg
 /sn_ZZ.ogg
 /sn_ZZZ.ogg
@@ -20,16 +20,16 @@
 /sn_aa.ogg
 /sn_aaa.ogg
 /sn_aaaa.ogg
-/snd_----.ogg
-/snd_---.ogg
-/snd_--.ogg
-/snd_-.ogg
-/snd_1.ogg
-/snd_11.ogg
-/snd_111.ogg
-/snd_1111.ogg
-/snd_@.ogg
-/snd_@@.ogg
+/snd_33.ogg
+/snd_333.ogg
+/snd_3333.ogg
+/snd_5.ogg
+/snd_55.ogg
+/snd_555.ogg
+/snd_5555.ogg
+/snd_BB.ogg
+/snd_BBB.ogg
+/snd_BBBB.ogg
 /snd_Z.ogg
 /snd_ZZ.ogg
 /snd_ZZZ.ogg
@@ -42,16 +42,16 @@
 /snd_aa.ogg
 /snd_aaa.ogg
 /snd_aaaa.ogg
-sn_----.ogg
-sn_---.ogg
-sn_--.ogg
-sn_-.ogg
-sn_1.ogg
-sn_11.ogg
-sn_111.ogg
-sn_1111.ogg
-sn_@.ogg
-sn_@@.ogg
+sn_33.ogg
+sn_333.ogg
+sn_3333.ogg
+sn_5.ogg
+sn_55.ogg
+sn_555.ogg
+sn_5555.ogg
+sn_BB.ogg
+sn_BBB.ogg
+sn_BBBB.ogg
 sn_Z.ogg
 sn_ZZ.ogg
 sn_ZZZ.ogg
@@ -64,17 +64,16 @@ sn_a.ogg
 sn_aa.ogg
 sn_aaa.ogg
 sn_aaaa.ogg
-sn_whatever.ogg
-snd_----.ogg
-snd_---.ogg
-snd_--.ogg
-snd_-.ogg
-snd_1.ogg
-snd_11.ogg
-snd_111.ogg
-snd_1111.ogg
-snd_@.ogg
-snd_@@.ogg
+snd_33.ogg
+snd_333.ogg
+snd_3333.ogg
+snd_5.ogg
+snd_55.ogg
+snd_555.ogg
+snd_5555.ogg
+snd_BB.ogg
+snd_BBB.ogg
+snd_BBBB.ogg
 snd_Z.ogg
 snd_ZZ.ogg
 snd_ZZZ.ogg
diff --git a/tests/types/_NonMatchingTests.txt b/tests/types/_NonMatchingTests.txt
index 6f8e84dfe..84d924919 100644
--- a/tests/types/_NonMatchingTests.txt
+++ b/tests/types/_NonMatchingTests.txt
@@ -1413,3 +1413,121 @@ odin_dll
 libodin_so
 notodin.dll
 notlibodin.so
+AGSteam_dll
+AGSteam.dlll
+fAGSteam.dll
+sub/dir/fAGSteam.dll
+AGSteam.dl
+gmsched_dll
+gmsched.dlll
+fgmsched.dll
+sub/dir/fgmsched.dll
+gmsched.dl
+partner_xml_sig
+partner.xml.sigg
+fpartner.xml.sig
+sub/dir/fpartner.xml.sig
+partner.xml_sig
+partner_xml.sig
+yscfg_dat
+yscfg.datt
+fyscfg.dat
+sub/dir/fyscfg.dat
+yscfg.da
+anybrainSDK_dll
+anybrainSDK.dlll
+fanybrainSDK.dll
+sub/dir/fanybrainSDK.dll
+anybrainSDK.dl
+Cerebro_dll
+Cerebro.dlll
+fCerebro.dll
+sub/dir/fCerebro.dll
+Cerebro.dl
+BlackCall_aes
+BlackCall64_aes
+BlackCall.aess
+BlackCall64.aess
+fBlackCall.aes
+fBlackCall64.aes
+sub/dir/fBlackCall.aes
+BlackCall.ae
+BlackCall65.aes
+BlackCat64_sys
+BlackCat64.syss
+fBlackCat64.sys
+sub/dir/fBlackCat64.sys
+BlackCat64.sy
+BlackCat32.sys
+NEP2_dll
+NEP2.dlll
+fNEP2.dll
+sub/dir/fNEP2.dll
+NEP2.dl
+NEP3.dll
+gameguard_des
+gameguard.dess
+fgameguard.des
+sub/dir/fgameguard.des
+gameguard.de
+gameguard.bes
+opus_dll
+opus.dlll
+fopus.dll
+sub/dir/fopus.dll
+opus.dl
+mus_test_ogg
+mus_music_ogg
+sub/dir/mus_test_ogg
+snd_test_ogg
+sn_test_ogg
+sub/dir/snd_test_ogg
+shared/shader_gar
+shared_shader.gar
+fshared/shader.gar
+fmetadata.dat
+sub/dir/fmetadata.dat
+data_win
+fdata.winn
+options_ini
+foptions.inii
+pixi_js
+fpixi.js
+pixi.jss
+Irrlicht_dll
+Irrlicht.dlll
+fIrrlicht.dll
+sakanagl_dll
+sakanagl.dlll
+fsakanagl.dll
+FalcoEngine_dll
+FalcoEngine.dlll
+fFalcoEngine.dll
+wme_steam_dll
+wme_steam.dlll
+fwme_steam.dll
+NeacSafe64_sys
+NeacSafe64.syss
+fNeacSafe64.sys
+NeacSafe64_ex_sys
+notFredaikisAntiCheat
+FredaikisAntiCheat.dll
+fFredaikisAntiCheat/
+PnkBstrA_exe
+PnkBstrA.exee
+fPnkBstrA.exe
+pbsv_dll
+pbsv.dlll
+fpbsv.dll
+fdata.xp3f
+krflash_dll
+krflash.dlll
+TrueAudioNext_dll
+TrueAudioNext.dlll
+fTrueAudioNext.dll
+iZotope_dll
+iZotope.dlll
+fiZotope.dll
+ortp_dll
+ortp.dlll
+fortp.dll