diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4679f8ac..3a1f5f04 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,33 @@ The format is based on [Keep a Changelog][kac], and this project adheres to
 - Deprecated the return type of `World:remove()` because it can now be inaccurate.
 - Deprecated `World:optimizeQueries()` because it no longer does anything.
 
+## [0.8.4] - 2024-08-15
+
+### Added
+
+- Better assertions / error messages added to `World` methods that accept
+  variadic component arguments. At least 1 component must be provided. These
+  assertions have been added to `get` `insert` `replace` `remove`
+- Ability to sort the world inspect table by clicking the table headers (entity
+  count and component name)
+- Ability to disable systems in the debugger list by right clicking them.
+
+### Changed
+
+- The alt-hover tooltip's text is smaller and the background is slightly darker
+  for improved legibility.
+- Component data now has syntax highlighting applied. This is present in the
+  **alt-hover tooltip** and the **entity inspector panel** in the debugger.
+
+### Fixed
+
+- The alt-hover tooltip now displays component data properly, with each
+  component being displayed on a new line.
+- Removed extra new-lines in component data strings within the debugger entity
+  inspect tables.
+- Fixed alt-hover erroring when hovered entity is despawned.
+- Fixed flashing buttons ("View queries" and "View logs") in system inspect panel
+
 ## [0.8.3] - 2024-07-02
 
 ### Fixed
@@ -301,7 +328,8 @@ The format is based on [Keep a Changelog][kac], and this project adheres to
 
 - Initial release
 
-[unreleased]: https://github.com/matter-ecs/matter/compare/v0.8.3...HEAD
+[unreleased]: https://github.com/matter-ecs/matter/compare/v0.8.4...HEAD
+[0.8.4]: https://github.com/matter-ecs/matter/releases/tag/v0.8.4
 [0.8.3]: https://github.com/matter-ecs/matter/releases/tag/v0.8.3
 [0.8.2]: https://github.com/matter-ecs/matter/releases/tag/v0.8.2
 [0.8.1]: https://github.com/matter-ecs/matter/releases/tag/v0.8.1
diff --git a/README.md b/README.md
index b79836b3..a4332b2b 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Matter can be installed with [Wally] by including it as a dependency in your
 `wally.toml` file.
 
 ```toml
-Matter = "matter-ecs/matter@0.8.3"
+Matter = "matter-ecs/matter@0.8.4"
 ```
 
 ## Migration
diff --git a/docs/Guides/Migration.md b/docs/Guides/Migration.md
index 2044fb04..f8205d8a 100644
--- a/docs/Guides/Migration.md
+++ b/docs/Guides/Migration.md
@@ -4,5 +4,5 @@ Migrating from `evaera/matter` to `matter-ecs/matter` is easy! The only thing yo
 
   ```toml title="wally.toml"
   [dependencies]
-  matter = "matter-ecs/matter@0.8.3"
+  matter = "matter-ecs/matter@0.8.4"
   ```
diff --git a/docs/Installation.md b/docs/Installation.md
index 3f4c83a4..02eb87c1 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -25,7 +25,7 @@ wally = "UpliftGames/wally@x.x.x"
 
 ```toml title="wally.toml"
 [dependencies]
-matter = "matter-ecs/matter@0.8.3"
+matter = "matter-ecs/matter@0.8.4"
 ```
 
 6. Run `wally install`.
diff --git a/lib/debugger/clientBindings.luau b/lib/debugger/clientBindings.luau
index 405aed41..fdac1a05 100644
--- a/lib/debugger/clientBindings.luau
+++ b/lib/debugger/clientBindings.luau
@@ -1,5 +1,21 @@
 local UserInputService = game:GetService("UserInputService")
 local CollectionService = game:GetService("CollectionService")
+
+local tags = {
+	system = "MatterDebuggerTooltip_System",
+	altHover = "MatterDebuggerTooltip_AltHover",
+}
+
+local function getOffset(mousePos: Vector2, tag: string): UDim2
+	if tag == tags.altHover then
+		return UDim2.fromOffset(mousePos.X + 20, mousePos.Y)
+	elseif tag == tags.system then
+		return UDim2.fromOffset(mousePos.X + 20, mousePos.Y + 10)
+	end
+
+	return UDim2.fromOffset(mousePos.X, mousePos.Y + 10)
+end
+
 local function clientBindings(debugger)
 	local connections = {}
 
@@ -21,20 +37,23 @@ local function clientBindings(debugger)
 
 			local mousePosition = UserInputService:GetMouseLocation()
 
-			for _, gui in CollectionService:GetTagged("MatterDebuggerTooltip") do
-				gui.Position = UDim2.new(0, mousePosition.X + 20, 0, mousePosition.Y)
+			for _, tag in tags do
+				for _, gui in CollectionService:GetTagged(tag) do
+					gui.Position = getOffset(mousePosition, tag)
+				end
 			end
 		end)
 	)
 
-	table.insert(
-		connections,
-		CollectionService:GetInstanceAddedSignal("MatterDebuggerTooltip"):Connect(function(gui)
-			local mousePosition = UserInputService:GetMouseLocation()
-
-			gui.Position = UDim2.new(0, mousePosition.X + 20, 0, mousePosition.Y)
-		end)
-	)
+	for _, tag in tags do
+		table.insert(
+			connections,
+			CollectionService:GetInstanceAddedSignal(tag):Connect(function(gui)
+				local mousePosition = UserInputService:GetMouseLocation()
+				gui.Position = getOffset(mousePosition, tag)
+			end)
+		)
+	end
 
 	return connections
 end
diff --git a/lib/debugger/ui.luau b/lib/debugger/ui.luau
index af4f968e..aa671a1d 100644
--- a/lib/debugger/ui.luau
+++ b/lib/debugger/ui.luau
@@ -29,10 +29,12 @@ end
 
 local IS_SERVER = RunService:IsServer()
 local IS_CLIENT = RunService:IsClient()
+local LONG_SYSTEM_NAME = 24
 
 local function ui(debugger, loop)
 	local plasma = debugger.plasma
 	local custom = debugger._customWidgets
+	local skipSystems = loop._skipSystems
 
 	plasma.setStyle({
 		primaryColor = Color3.fromHex("bd515c"),
@@ -48,6 +50,8 @@ local function ui(debugger, loop)
 		end
 	end
 
+	local hoveredSystem
+
 	custom.container(function()
 		if debugger:_isServerView() then
 			return
@@ -141,7 +145,7 @@ local function ui(debugger, loop)
 				})
 				plasma.space(5)
 
-				local items = {}
+				local listOfSystems = {}
 
 				for _, system in systems do
 					local samples = loop.profiling[system]
@@ -168,23 +172,48 @@ local function ui(debugger, loop)
 						icon = "\xf0\x9f\x92\xa5"
 					end
 
-					table.insert(items, {
-						text = systemName(system),
-						sideText = averageFrameTime,
+					local barWidth
+					if longestDuration == 0 then
+						barWidth = 0
+					else
+						barWidth = duration / longestDuration
+					end
+
+					local systemIsDisabled = skipSystems[system]
+					local systemName = systemName(system)
+					local length = string.len(systemName)
+
+					if systemIsDisabled then
+						length += 4
+					end
+
+					table.insert(listOfSystems, {
+						text = if systemIsDisabled then `<i><s>{systemName}</s></i>` else systemName,
+						sideText = if systemIsDisabled then `<b>{"(disabled)"}</b>` else averageFrameTime,
 						selected = debugger.debugSystem == system,
 						system = system,
 						icon = icon,
-						barWidth = duration / longestDuration,
+						barWidth = barWidth,
 						index = index,
 					})
 				end
 
-				local selected = custom.selectionList(items):selected()
+				local systemList = custom.selectionList(listOfSystems, custom)
+				local selected = systemList:selected()
+				local rightClicked = systemList:rightClicked()
+				hoveredSystem = systemList:hovered()
+
 				if selected then
-					if selected.system == debugger.debugSystem then
+					local selectedSystem = selected.system
+					if selectedSystem == debugger.debugSystem then
 						debugger.debugSystem = nil
 					else
-						debugger.debugSystem = selected.system
+						debugger.debugSystem = selectedSystem
+					end
+				elseif rightClicked then
+					local rightClickedSystem = rightClicked.system
+					if rightClickedSystem then
+						skipSystems[rightClickedSystem] = not skipSystems[rightClickedSystem]
 					end
 				end
 
@@ -234,28 +263,26 @@ local function ui(debugger, loop)
 					}, function()
 						plasma.useKey(name)
 
-						plasma.row(function()
-							if plasma.button(string.format("View queries (%d)", #debugger._queries)):clicked() then
-								setQueriesOpen(true)
-							end
+						if plasma.button(string.format("View queries (%d)", #debugger._queries)):clicked() then
+							setQueriesOpen(true)
+						end
 
-							if numLogs > 0 then
-								if plasma.button(string.format("View logs (%d)", numLogs)):clicked() then
-									setLogsOpen(true)
-								end
+						if numLogs > 0 then
+							if plasma.button(string.format("View logs (%d)", numLogs)):clicked() then
+								setLogsOpen(true)
 							end
-						end)
+						end
 
-						local currentlyDisabled = loop._skipSystems[debugger.debugSystem]
+						local currentlyDisabled = skipSystems[debugger.debugSystem]
 
 						if
 							plasma
-								.checkbox("Disable system", {
+								.checkbox("<font size='13'>Disable System</font>", {
 									checked = currentlyDisabled,
 								})
 								:clicked()
 						then
-							loop._skipSystems[debugger.debugSystem] = not currentlyDisabled
+							skipSystems[debugger.debugSystem] = not currentlyDisabled
 						end
 					end)
 					:closed()
@@ -311,6 +338,23 @@ local function ui(debugger, loop)
 		direction = Enum.FillDirection.Horizontal,
 		padding = 0,
 	})
+
+	if hoveredSystem and hoveredSystem.system then
+		local hoveredSystemName = systemName(hoveredSystem.system)
+		local length = string.len(hoveredSystemName)
+		local systemDisabled = skipSystems[hoveredSystem.system]
+
+		if systemDisabled then
+			length += 2
+		end
+
+		if length >= LONG_SYSTEM_NAME then
+			custom.tooltip(`<b>{hoveredSystemName}{if systemDisabled then " (disabled)" else ""}</b>`, {
+				tag = "MatterDebuggerTooltip_System",
+				backgroundTransparency = 0,
+			})
+		end
+	end
 end
 
 return ui
diff --git a/lib/debugger/widgets/hoverInspect.luau b/lib/debugger/widgets/hoverInspect.luau
index d9b5daa3..c0c10d88 100644
--- a/lib/debugger/widgets/hoverInspect.luau
+++ b/lib/debugger/widgets/hoverInspect.luau
@@ -18,6 +18,9 @@ return function(plasma)
 			end
 		end
 
-		custom.tooltip(str)
+		custom.tooltip(str, {
+			tag = "MatterDebuggerTooltip_AltHover",
+			backgroundTransparency = 0.15,
+		})
 	end)
 end
diff --git a/lib/debugger/widgets/selectionList.luau b/lib/debugger/widgets/selectionList.luau
index 5842b00f..9d44a774 100644
--- a/lib/debugger/widgets/selectionList.luau
+++ b/lib/debugger/widgets/selectionList.luau
@@ -1,13 +1,16 @@
 return function(Plasma)
 	local create = Plasma.create
 
-	local Item = Plasma.widget(function(text, selected, icon, sideText, _, barWidth, index)
+	local Item = Plasma.widget(function(text, selected, icon, sideText, barWidth, index)
 		local clicked, setClicked = Plasma.useState(false)
+		local rightClicked, setRightClicked = Plasma.useState(false)
+		local hovered, setHovered = Plasma.useState(false)
 		local style = Plasma.useStyle()
 
 		local refs = Plasma.useInstance(function(ref)
 			local button = create("TextButton", {
 				[ref] = "button",
+				AutoButtonColor = false,
 				Size = UDim2.new(1, 0, 0, 25),
 				Text = "",
 
@@ -34,6 +37,7 @@ return function(Plasma)
 					}),
 
 					create("TextLabel", {
+						[ref] = "index",
 						Name = "index",
 						AutomaticSize = Enum.AutomaticSize.X,
 						Size = UDim2.new(0, 0, 1, 0),
@@ -58,10 +62,12 @@ return function(Plasma)
 					}),
 
 					create("TextLabel", {
+						[ref] = "mainText",
 						AutomaticSize = Enum.AutomaticSize.X,
 						BackgroundTransparency = 1,
 						Size = UDim2.new(0, 0, 1, 0),
 						Text = text,
+						RichText = true,
 						TextXAlignment = Enum.TextXAlignment.Left,
 						TextSize = 13,
 						TextColor3 = style.textColor,
@@ -81,6 +87,7 @@ return function(Plasma)
 						Text = "",
 						TextXAlignment = Enum.TextXAlignment.Left,
 						TextSize = 11,
+						RichText = true,
 						TextColor3 = style.mutedTextColor,
 						Font = Enum.Font.Gotham,
 					}),
@@ -98,8 +105,20 @@ return function(Plasma)
 					ZIndex = 2,
 				}),
 
-				Activated = function()
-					setClicked(true)
+				InputBegan = function(input: InputObject)
+					if input.UserInputType == Enum.UserInputType.MouseButton1 then
+						setClicked(true)
+					elseif input.UserInputType == Enum.UserInputType.MouseButton2 then
+						setRightClicked(true)
+					end
+				end,
+
+				MouseEnter = function()
+					setHovered(true)
+				end,
+
+				MouseLeave = function()
+					setHovered(false)
 				end,
 			})
 
@@ -107,7 +126,7 @@ return function(Plasma)
 		end)
 
 		Plasma.useEffect(function()
-			refs.button.container.TextLabel.Text = text
+			refs.mainText.Text = text
 			refs.button.container.Icon.Text = icon or ""
 			refs.button.container.Icon.Visible = icon ~= nil
 		end, text, icon)
@@ -115,13 +134,18 @@ return function(Plasma)
 		refs.button.container.sideText.Visible = sideText ~= nil
 		refs.button.container.sideText.Text = if sideText ~= nil then sideText else ""
 		refs.button.container.sideText.TextColor3 = if selected then style.textColor else style.mutedTextColor
-		refs.button.container.TextLabel.TextTruncate = sideText and Enum.TextTruncate.AtEnd or Enum.TextTruncate.None
+		refs.mainText.TextTruncate = sideText and Enum.TextTruncate.AtEnd or Enum.TextTruncate.None
 
 		refs.button.bar.Size = UDim2.new(barWidth or 0, 0, 0, 1)
 
 		Plasma.useEffect(function()
-			refs.button.BackgroundColor3 = if selected then style.primaryColor else style.bg2
-		end, selected)
+			refs.button.BackgroundColor3 = if selected
+				then style.primaryColor
+				elseif hovered then style.bg1
+				else style.bg2
+
+			refs.index.TextColor3 = if selected or hovered then style.textColor else style.mutedTextColor
+		end, selected, hovered)
 
 		return {
 			clicked = function()
@@ -132,19 +156,29 @@ return function(Plasma)
 
 				return false
 			end,
+			rightClicked = function()
+				if rightClicked then
+					setRightClicked(false)
+					return true
+				end
+
+				return false
+			end,
+			hovered = function()
+				return hovered
+			end,
 		}
 	end)
 
-	return Plasma.widget(function(items, options)
-		options = options or {}
-
+	return Plasma.widget(function(items)
 		Plasma.useInstance(function()
 			local frame = create("Frame", {
 				BackgroundTransparency = 1,
-				Size = options.width and UDim2.new(0, options.width, 0, 0) or UDim2.new(1, 0, 0, 0),
+				Size = UDim2.new(1, 0, 0, 0),
 
 				create("UIListLayout", {
 					SortOrder = Enum.SortOrder.LayoutOrder,
+					Padding = UDim.new(0, 2),
 				}),
 			})
 
@@ -156,19 +190,35 @@ return function(Plasma)
 		end)
 
 		local selected
+		local rightClicked
+		local hovered
 
 		for _, item in items do
-			if
-				Item(item.text, item.selected, item.icon, item.sideText, options.width, item.barWidth, item.index):clicked()
-			then
+			local buttonInList = Item(item.text, item.selected, item.icon, item.sideText, item.barWidth, item.index)
+
+			if buttonInList:clicked() then
 				selected = item
 			end
+
+			if buttonInList:rightClicked() then
+				rightClicked = item
+			end
+
+			if buttonInList:hovered() then
+				hovered = item
+			end
 		end
 
 		return {
 			selected = function()
 				return selected
 			end,
+			rightClicked = function()
+				return rightClicked
+			end,
+			hovered = function()
+				return hovered
+			end,
 		}
 	end)
 end
diff --git a/lib/debugger/widgets/tooltip.luau b/lib/debugger/widgets/tooltip.luau
index a99f969a..499479df 100644
--- a/lib/debugger/widgets/tooltip.luau
+++ b/lib/debugger/widgets/tooltip.luau
@@ -1,8 +1,14 @@
 local CollectionService = game:GetService("CollectionService")
+
+type Options = {
+	tag: string,
+	backgroundTransparency: number?,
+}
+
 return function(plasma)
 	local create = plasma.create
 
-	return plasma.widget(function(text)
+	return plasma.widget(function(text, options: Options)
 		local refs = plasma.useInstance(function(ref)
 			local style = plasma.useStyle()
 
@@ -16,9 +22,10 @@ return function(plasma)
 				Font = Enum.Font.Code,
 				TextStrokeTransparency = 0.5,
 				TextColor3 = Color3.new(1, 1, 1),
-				BackgroundTransparency = 0.2,
+				BackgroundTransparency = options.backgroundTransparency or 0.2,
 				BackgroundColor3 = style.bg1,
 				AutomaticSize = Enum.AutomaticSize.XY,
+				ZIndex = 100,
 
 				create("UIPadding", {
 					PaddingBottom = UDim.new(0, 4),
@@ -34,7 +41,7 @@ return function(plasma)
 				}),
 			})
 
-			CollectionService:AddTag(ref.label, "MatterDebuggerTooltip")
+			CollectionService:AddTag(ref.label, options.tag)
 
 			return ref.label
 		end)
diff --git a/wally.toml b/wally.toml
index d3139569..ae150483 100644
--- a/wally.toml
+++ b/wally.toml
@@ -1,7 +1,7 @@
 [package]
 name = "matter-ecs/matter"
 description = "A modern ECS library for Roblox"
-version = "0.8.3"
+version = "0.8.4"
 license = "MIT"
 authors = [
     "Eryn L. K.",