diff --git a/build/Version.props b/build/Version.props
index af7c24e51a..c6573e2f14 100644
--- a/build/Version.props
+++ b/build/Version.props
@@ -3,15 +3,15 @@
   <!-- Integration tests will ensure they match across the board -->
   <Import Project="WebpanelVersion.props" />
   <PropertyGroup>
-    <TgsCoreVersion>6.9.2</TgsCoreVersion>
+    <TgsCoreVersion>6.10.0</TgsCoreVersion>
     <TgsConfigVersion>5.2.0</TgsConfigVersion>
-    <TgsApiVersion>10.7.0</TgsApiVersion>
+    <TgsApiVersion>10.8.0</TgsApiVersion>
     <TgsCommonLibraryVersion>7.0.0</TgsCommonLibraryVersion>
     <TgsApiLibraryVersion>13.7.0</TgsApiLibraryVersion>
     <TgsClientVersion>16.0.0</TgsClientVersion>
-    <TgsDmapiVersion>7.2.1</TgsDmapiVersion>
-    <TgsInteropVersion>5.9.0</TgsInteropVersion>
-    <TgsHostWatchdogVersion>1.4.1</TgsHostWatchdogVersion>
+    <TgsDmapiVersion>7.3.0</TgsDmapiVersion>
+    <TgsInteropVersion>5.10.0</TgsInteropVersion>
+    <TgsHostWatchdogVersion>1.5.0</TgsHostWatchdogVersion>
     <TgsContainerScriptVersion>1.2.1</TgsContainerScriptVersion>
     <TgsMigratorVersion>2.0.0</TgsMigratorVersion>
     <TgsNugetNetFramework>netstandard2.0</TgsNugetNetFramework>
diff --git a/build/tgstation-server.service b/build/tgstation-server.service
index 98c03fee57..44ce74fe2e 100644
--- a/build/tgstation-server.service
+++ b/build/tgstation-server.service
@@ -11,7 +11,7 @@ User=tgstation-server
 Type=notify-reload
 NotifyAccess=all
 WorkingDirectory=/opt/tgstation-server
-ExecStart=/usr/bin/dotnet Tgstation.Server.Host.Console.dll --appsettings-base-path=/etc/tgstation-server --General:SetupWizardMode=Never --Internal:UsingSystemD=true
+ExecStart=/usr/bin/dotnet Tgstation.Server.Host.Console.dll --appsettings-base-path=/etc/tgstation-server --General:SetupWizardMode=Never
 TimeoutStartSec=600
 Restart=always
 KillMode=process
diff --git a/src/DMAPI/tgs.dm b/src/DMAPI/tgs.dm
index 4766b3dfe6..42f2d5fc31 100644
--- a/src/DMAPI/tgs.dm
+++ b/src/DMAPI/tgs.dm
@@ -1,7 +1,7 @@
 // tgstation-server DMAPI
 // The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in IETF RFC 2119.
 
-#define TGS_DMAPI_VERSION "7.2.1"
+#define TGS_DMAPI_VERSION "7.3.0"
 
 // All functions and datums outside this document are subject to change with any version and should not be relied on.
 
diff --git a/src/DMAPI/tgs/v5/__interop_version.dm b/src/DMAPI/tgs/v5/__interop_version.dm
index f4806f7adb..29ea239ad8 100644
--- a/src/DMAPI/tgs/v5/__interop_version.dm
+++ b/src/DMAPI/tgs/v5/__interop_version.dm
@@ -1 +1 @@
-"5.9.0"
+"5.10.0"
diff --git a/src/DMAPI/tgs/v5/_defines.dm b/src/DMAPI/tgs/v5/_defines.dm
index 92c7a8388a..a47bfd7800 100644
--- a/src/DMAPI/tgs/v5/_defines.dm
+++ b/src/DMAPI/tgs/v5/_defines.dm
@@ -95,6 +95,7 @@
 #define DMAPI5_TOPIC_PARAMETER_NEW_SERVER_VERSION "newServerVersion"
 #define DMAPI5_TOPIC_PARAMETER_BROADCAST_MESSAGE "broadcastMessage"
 
+#define DMAPI5_TOPIC_RESPONSE_CLIENT_COUNT "clientCount"
 #define DMAPI5_TOPIC_RESPONSE_COMMAND_RESPONSE "commandResponse"
 #define DMAPI5_TOPIC_RESPONSE_COMMAND_RESPONSE_MESSAGE "commandResponseMessage"
 #define DMAPI5_TOPIC_RESPONSE_CHAT_RESPONSES "chatResponses"
diff --git a/src/DMAPI/tgs/v5/topic.dm b/src/DMAPI/tgs/v5/topic.dm
index e1f2cb6385..59e5e63e5c 100644
--- a/src/DMAPI/tgs/v5/topic.dm
+++ b/src/DMAPI/tgs/v5/topic.dm
@@ -149,7 +149,9 @@
 		if(DMAPI5_TOPIC_COMMAND_HEALTHCHECK)
 			if(event_handler && event_handler.receive_health_checks)
 				event_handler.HandleEvent(TGS_EVENT_HEALTH_CHECK)
-			return TopicResponse()
+			var/list/health_check_response = TopicResponse()
+			health_check_response[DMAPI5_TOPIC_RESPONSE_CLIENT_COUNT] = TGS_CLIENT_COUNT
+			return health_check_response;
 
 		if(DMAPI5_TOPIC_COMMAND_WATCHDOG_REATTACH)
 			detached = FALSE
diff --git a/src/DMAPI/tgs/v5/undefs.dm b/src/DMAPI/tgs/v5/undefs.dm
index 237207fdfd..d8dbf7a781 100644
--- a/src/DMAPI/tgs/v5/undefs.dm
+++ b/src/DMAPI/tgs/v5/undefs.dm
@@ -17,8 +17,8 @@
 #undef DMAPI5_BRIDGE_COMMAND_EVENT
 
 #undef DMAPI5_PARAMETER_ACCESS_IDENTIFIER
+#undef DMAPI5_PARAMETER_CLIENT_COUNT
 #undef DMAPI5_PARAMETER_CUSTOM_COMMANDS
-#undef DMAPI5_PARAMETER_TOPIC_PORT
 
 #undef DMAPI5_CHUNK
 #undef DMAPI5_CHUNK_PAYLOAD
@@ -95,6 +95,7 @@
 #undef DMAPI5_TOPIC_PARAMETER_NEW_SERVER_VERSION
 #undef DMAPI5_TOPIC_PARAMETER_BROADCAST_MESSAGE
 
+#undef DMAPI5_TOPIC_RESPONSE_CLIENT_COUNT
 #undef DMAPI5_TOPIC_RESPONSE_COMMAND_RESPONSE
 #undef DMAPI5_TOPIC_RESPONSE_COMMAND_RESPONSE_MESSAGE
 #undef DMAPI5_TOPIC_RESPONSE_CHAT_RESPONSES
diff --git a/src/Tgstation.Server.Api/Models/Internal/DreamDaemonApiBase.cs b/src/Tgstation.Server.Api/Models/Internal/DreamDaemonApiBase.cs
index 6bde7948d0..e3411b8115 100644
--- a/src/Tgstation.Server.Api/Models/Internal/DreamDaemonApiBase.cs
+++ b/src/Tgstation.Server.Api/Models/Internal/DreamDaemonApiBase.cs
@@ -1,4 +1,6 @@
-namespace Tgstation.Server.Api.Models.Internal
+using System;
+
+namespace Tgstation.Server.Api.Models.Internal
 {
 	/// <summary>
 	/// Base class for DreamDaemon API models.
@@ -11,6 +13,18 @@
 		[ResponseOptions]
 		public long? SessionId { get; set; }
 
+		/// <summary>
+		/// When the current server execution was started.
+		/// </summary>
+		[ResponseOptions]
+		public DateTimeOffset? LaunchTime { get; set; }
+
+		/// <summary>
+		/// The last known count of connected players. Requires <see cref="DreamDaemonLaunchParameters.HealthCheckSeconds"/> to not be 0 and a game server interop version >= 5.10.0 to populate.
+		/// </summary>
+		[ResponseOptions]
+		public int? ClientCount { get; set; }
+
 		/// <summary>
 		/// If the server is undergoing a soft reset. This may be automatically set by changes to other fields.
 		/// </summary>
diff --git a/src/Tgstation.Server.Host.Console/Program.cs b/src/Tgstation.Server.Host.Console/Program.cs
index c8383865af..26f5b8f5b5 100644
--- a/src/Tgstation.Server.Host.Console/Program.cs
+++ b/src/Tgstation.Server.Host.Console/Program.cs
@@ -1,10 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Threading;
 using System.Threading.Tasks;
 
+using Microsoft.Extensions.Hosting.Systemd;
 using Microsoft.Extensions.Logging;
 
 using Tgstation.Server.Common;
@@ -44,6 +46,11 @@ namespace Tgstation.Server.Host.Console
 			var trace = arguments.Remove("--trace-host-watchdog");
 			var debug = arguments.Remove("--debug-host-watchdog");
 
+			const string SystemDArg = "--Internal:UsingSystemD=true";
+			if (!arguments.Any(arg => arg.Equals(SystemDArg, StringComparison.OrdinalIgnoreCase))
+				&& SystemdHelpers.IsSystemdService())
+				arguments.Add(SystemDArg);
+
 			using var loggerFactory = LoggerFactory.Create(builder =>
 			{
 				if (trace)
diff --git a/src/Tgstation.Server.Host.Console/Tgstation.Server.Host.Console.csproj b/src/Tgstation.Server.Host.Console/Tgstation.Server.Host.Console.csproj
index 3cbf1c1a16..a405553d55 100644
--- a/src/Tgstation.Server.Host.Console/Tgstation.Server.Host.Console.csproj
+++ b/src/Tgstation.Server.Host.Console/Tgstation.Server.Host.Console.csproj
@@ -11,6 +11,8 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <!-- Usage: Identifying if we're running under SystemD -->
+    <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="8.0.0" />
     <!-- Usage: Console logging plugin -->
     <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
   </ItemGroup>
diff --git a/src/Tgstation.Server.Host/Components/Interop/Topic/TopicResponse.cs b/src/Tgstation.Server.Host/Components/Interop/Topic/TopicResponse.cs
index 12db6f3ef1..e5b30150de 100644
--- a/src/Tgstation.Server.Host/Components/Interop/Topic/TopicResponse.cs
+++ b/src/Tgstation.Server.Host/Components/Interop/Topic/TopicResponse.cs
@@ -36,5 +36,10 @@ namespace Tgstation.Server.Host.Components.Interop.Topic
 
 		/// <inheritdoc />
 		public IReadOnlyCollection<uint>? MissingChunks { get; set; }
+
+		/// <summary>
+		/// The number of connected clients to the game. Added in Interop 5.10.0.
+		/// </summary>
+		public int? ClientCount { get; }
 	}
 }
diff --git a/src/Tgstation.Server.Host/Components/Session/SessionController.cs b/src/Tgstation.Server.Host/Components/Session/SessionController.cs
index 754b672b7d..77a25fd979 100644
--- a/src/Tgstation.Server.Host/Components/Session/SessionController.cs
+++ b/src/Tgstation.Server.Host/Components/Session/SessionController.cs
@@ -124,6 +124,9 @@ namespace Tgstation.Server.Host.Components.Session
 		/// <inheritdoc />
 		public long? MemoryUsage => process.MemoryUsage;
 
+		/// <inheritdoc />
+		public DateTimeOffset? LaunchTime => process.LaunchTime;
+
 		/// <summary>
 		/// The <see cref="Byond.TopicSender.ITopicClient"/> for the <see cref="SessionController"/>.
 		/// </summary>
diff --git a/src/Tgstation.Server.Host/Components/Watchdog/IWatchdog.cs b/src/Tgstation.Server.Host/Components/Watchdog/IWatchdog.cs
index 2220c56932..35da1504f8 100644
--- a/src/Tgstation.Server.Host/Components/Watchdog/IWatchdog.cs
+++ b/src/Tgstation.Server.Host/Components/Watchdog/IWatchdog.cs
@@ -19,6 +19,16 @@ namespace Tgstation.Server.Host.Components.Watchdog
 		/// </summary>
 		long? SessionId { get; }
 
+		/// <summary>
+		/// When the current server executions was started.
+		/// </summary>
+		DateTimeOffset? LaunchTime { get; }
+
+		/// <summary>
+		/// Last known client count queried from the DMAPI. Requires health checks to be enabled to populate.
+		/// </summary>
+		int? ClientCount { get; }
+
 		/// <summary>
 		/// The current <see cref="WatchdogStatus"/>.
 		/// </summary>
diff --git a/src/Tgstation.Server.Host/Components/Watchdog/WatchdogBase.cs b/src/Tgstation.Server.Host/Components/Watchdog/WatchdogBase.cs
index 5d9326ce7d..3c67ca495c 100644
--- a/src/Tgstation.Server.Host/Components/Watchdog/WatchdogBase.cs
+++ b/src/Tgstation.Server.Host/Components/Watchdog/WatchdogBase.cs
@@ -38,6 +38,12 @@ namespace Tgstation.Server.Host.Components.Watchdog
 		/// <inheritdoc />
 		public long? SessionId => GetActiveController()?.ReattachInformation.Id;
 
+		/// <inheritdoc />
+		public int? ClientCount { get; private set; }
+
+		/// <inheritdoc />
+		public DateTimeOffset? LaunchTime => GetActiveController()?.LaunchTime;
+
 		/// <inheritdoc />
 		public WatchdogStatus Status
 		{
@@ -567,6 +573,7 @@ namespace Tgstation.Server.Host.Components.Watchdog
 			// since neither server is running, this is safe to do
 			LastLaunchParameters = ActiveLaunchParameters;
 			healthChecksMissed = 0;
+			ClientCount = null;
 
 			try
 			{
@@ -664,6 +671,7 @@ namespace Tgstation.Server.Host.Components.Watchdog
 			// we lost the server, just restart entirely
 			// DCT: Operation must always run
 			await DisposeAndNullControllers(CancellationToken.None);
+			ClientCount = null;
 			const string FailReattachMessage = "Unable to properly reattach to server! Restarting watchdog...";
 			Logger.LogWarning(FailReattachMessage);
 
@@ -1180,7 +1188,10 @@ namespace Tgstation.Server.Host.Components.Watchdog
 				}
 			}
 			else
+			{
 				healthChecksMissed = 0;
+				ClientCount = response.ClientCount;
+			}
 
 			return MonitorAction.Continue;
 		}
diff --git a/src/Tgstation.Server.Host/Controllers/DreamDaemonController.cs b/src/Tgstation.Server.Host/Controllers/DreamDaemonController.cs
index 79e03ebb84..e6760f0f17 100644
--- a/src/Tgstation.Server.Host/Controllers/DreamDaemonController.cs
+++ b/src/Tgstation.Server.Host/Controllers/DreamDaemonController.cs
@@ -366,6 +366,8 @@ namespace Tgstation.Server.Host.Controllers
 						firstIteration = false;
 						result.Status = dd.Status;
 						result.SessionId = dd.SessionId;
+						result.LaunchTime = dd.LaunchTime;
+						result.ClientCount = dd.ClientCount;
 					}
 					while (result.Status == WatchdogStatus.Online && !result.SessionId.HasValue); // this is the one invalid combo, it's not that racy
 
diff --git a/src/Tgstation.Server.Host/System/IProcessBase.cs b/src/Tgstation.Server.Host/System/IProcessBase.cs
index 6ae88dce50..b95b0bf928 100644
--- a/src/Tgstation.Server.Host/System/IProcessBase.cs
+++ b/src/Tgstation.Server.Host/System/IProcessBase.cs
@@ -1,4 +1,5 @@
-using System.Threading;
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace Tgstation.Server.Host.System
@@ -8,6 +9,11 @@ namespace Tgstation.Server.Host.System
 	/// </summary>
 	public interface IProcessBase
 	{
+		/// <summary>
+		/// When the process was started.
+		/// </summary>
+		DateTimeOffset? LaunchTime { get; }
+
 		/// <summary>
 		/// The <see cref="Task{TResult}"/> resulting in the exit code of the process or <see langword="null"/> if the process was detached.
 		/// </summary>
diff --git a/src/Tgstation.Server.Host/System/Process.cs b/src/Tgstation.Server.Host/System/Process.cs
index e180cfc3cc..76f9ef56f3 100644
--- a/src/Tgstation.Server.Host/System/Process.cs
+++ b/src/Tgstation.Server.Host/System/Process.cs
@@ -16,6 +16,23 @@ namespace Tgstation.Server.Host.System
 		/// <inheritdoc />
 		public int Id { get; }
 
+		/// <inheritdoc />
+		public DateTimeOffset? LaunchTime
+		{
+			get
+			{
+				try
+				{
+					return handle.StartTime;
+				}
+				catch (Exception ex)
+				{
+					logger.LogWarning(ex, "Failed to get PID {pid}'s memory usage!", Id);
+					return null;
+				}
+			}
+		}
+
 		/// <inheritdoc />
 		public Task Startup { get; }
 
diff --git a/tests/Tgstation.Server.Tests/Live/Instance/WatchdogTest.cs b/tests/Tgstation.Server.Tests/Live/Instance/WatchdogTest.cs
index 08f436b26d..d7930e0cc6 100644
--- a/tests/Tgstation.Server.Tests/Live/Instance/WatchdogTest.cs
+++ b/tests/Tgstation.Server.Tests/Live/Instance/WatchdogTest.cs
@@ -682,6 +682,7 @@ namespace Tgstation.Server.Tests.Live.Instance
 			Assert.AreEqual(WatchdogStatus.Offline, daemonStatus.Status.Value);
 			Assert.IsNotNull(daemonStatus.ActiveCompileJob);
 			Assert.IsFalse(daemonStatus.SessionId.HasValue);
+			Assert.IsFalse(daemonStatus.LaunchTime.HasValue);
 			Assert.IsNull(daemonStatus.StagedCompileJob);
 			Assert.AreEqual(DMApiConstants.InteropVersion, daemonStatus.ActiveCompileJob.DMApiVersion);
 			Assert.AreEqual(DreamDaemonSecurity.Trusted, daemonStatus.ActiveCompileJob.MinimumSecurityLevel);
@@ -730,6 +731,7 @@ namespace Tgstation.Server.Tests.Live.Instance
 			daemonStatus = await instanceClient.DreamDaemon.Read(cancellationToken);
 			Assert.AreEqual(WatchdogStatus.Offline, daemonStatus.Status.Value);
 			Assert.IsFalse(daemonStatus.SessionId.HasValue);
+			Assert.IsFalse(daemonStatus.LaunchTime.HasValue);
 			await ExpectGameDirectoryCount(1, cancellationToken);
 
 			await CheckDMApiFail(daemonStatus.ActiveCompileJob, cancellationToken, false);
@@ -741,12 +743,18 @@ namespace Tgstation.Server.Tests.Live.Instance
 			}, cancellationToken);
 			Assert.AreEqual(string.Empty, daemonStatus.AdditionalParameters);
 			Assert.IsFalse(daemonStatus.SessionId.HasValue);
+			Assert.IsFalse(daemonStatus.LaunchTime.HasValue);
 		}
 
 		long? sessionIdTracker;
 		void ValidateSessionId(DreamDaemonResponse daemonStatus, bool? knownIncrease)
 		{
 			Assert.IsTrue(daemonStatus.SessionId.HasValue, $"Expected a session ID in the DreamDaemonResponse");
+			Assert.IsTrue(daemonStatus.LaunchTime.HasValue);
+			Assert.IsTrue(daemonStatus.LaunchTime.Value >= DateTimeOffset.UtcNow.AddHours(-1));
+
+			if (daemonStatus.ClientCount.HasValue)
+				Assert.AreEqual(0, daemonStatus.ClientCount.Value);
 
 			if (sessionIdTracker.HasValue)
 				if (knownIncrease.HasValue)
@@ -856,6 +864,8 @@ namespace Tgstation.Server.Tests.Live.Instance
 			// Ensure it's responding to health checks
 			await Task.WhenAny(Task.Delay(7000, cancellationToken), ourProcessHandler.Lifetime);
 			Assert.IsFalse(ddProc.HasExited);
+			var daemonStatus = await instanceClient.DreamDaemon.Read(cancellationToken);
+			Assert.AreEqual(0, daemonStatus.ClientCount);
 
 			// check DD agrees
 			var topicRequestResult = await SendTestTopic(