diff --git a/bundles/left4dead2/files/setup b/bundles/left4dead2/files/setup
index e20633b..270230a 100644
--- a/bundles/left4dead2/files/setup
+++ b/bundles/left4dead2/files/setup
@@ -2,6 +2,46 @@
 
 set -xeuo pipefail
 
+# -- DEFINE FUNCTIONS AND VARIABLES -- #
+
+function steam() {
+    # for systemd, so it can terminate the process (for other things sudo would have been enough)
+    setpriv --reuid=steam --regid=steam --init-groups "$@"
+    export HOME=/opt/l4d2/steam
+}
+
+declare -A addons=(
+    [Ions_Vocalizer]=698857882
+    [EMS_Admin_System]=1376314661
+)
+
+function install_addon() {
+    local overlay="$1"
+    local addon_name="$2"
+    local addon_id="${addons[${addon_name}]}"
+    steam mkdir -p "/opt/l4d2/overlays/${overlay}/left4dead2/addons"
+    test -f "/opt/l4d2/overlays/${overlay}/left4dead2/addons/${addon_id}.vpk" || \
+        steam /opt/l4d2/steam-workshop-download "${addon_id}" --out "/opt/l4d2/overlays/${overlay}/left4dead2/addons"
+}
+
+function install_admin_system() {
+    local overlay="$1"
+    install_addon "${overlay}" EMS_Admin_System
+    steam mkdir -p "/opt/l4d2/overlays/${overlay}/left4dead2/ems/admin system"
+    steam echo "STEAM_1:0:12376499" > "/opt/l4d2/overlays/${overlay}/left4dead2/ems/admin system/admins.txt"
+}
+
+function install_tickrate_enabler() {
+    local overlay="$1"
+    steam mkdir -p "/opt/l4d2/overlays/${overlay}/left4dead2/addons"
+    for file in tickrate_enabler.dll tickrate_enabler.so tickrate_enabler.vdf
+    do
+        curl -L "https://github.com/SirPlease/L4D2-Competitive-Rework/raw/refs/heads/master/addons/${file}" -o "/opt/l4d2/overlays/${overlay}/left4dead2/addons/${file}"
+    done
+}
+
+# -- PREPARE SYSTEM -- #
+
 getent passwd steam >/dev/null || useradd -M -d /opt/l4d2 -s /bin/bash steam
 mkdir -p /opt/l4d2 /tmp/dumps
 chown steam:steam /opt/l4d2 /tmp/dumps
@@ -9,12 +49,6 @@ dpkg --add-architecture i386
 apt update
 DEBIAN_FRONTEND=noninteractive apt install -y libc6:i386 lib32z1
 
-function steam() {
-    # für systemd, damit es den prozess beenden kann
-    setpriv --reuid=steam --regid=steam --init-groups "$@"
-    export HOME=/opt/l4d2/steam
-}
-
 # -- STEAM -- #
 
 steam mkdir -p /opt/l4d2/steam
@@ -77,18 +111,47 @@ net_splitpacket_maxrate 60000
 EOF
 
 # admin system
-steam mkdir -p /opt/l4d2/overlays/pve/left4dead2/addons
-test -f /opt/l4d2/overlays/pve/left4dead2/addons/2524204971.vpk || \
-    steam /opt/l4d2/steam-workshop-download 2524204971 --out /opt/l4d2/overlays/pve/left4dead2/addons
-steam mkdir -p "/opt/l4d2/overlays/pve/left4dead2/ems/admin system"
-steam echo "STEAM_1:0:12376499" > "/opt/l4d2/overlays/pve/left4dead2/ems/admin system/admins.txt"
+install_addon pve Ions_Vocalizer
+install_admin_system pve
+install_tickrate_enabler pve
 
-# ions vocalizer
-test -f /opt/l4d2/overlays/pve/left4dead2/addons/698857882.vpk || \
-    steam /opt/l4d2/steam-workshop-download 698857882 --out /opt/l4d2/overlays/pve/left4dead2/addons
+# -- OVERLAY 100TICK -- #
 
-test -f /opt/l4d2/overlays/pve/left4dead2/addons/1575673903.vpk || \
-    steam /opt/l4d2/steam-workshop-download 1575673903 --out /opt/l4d2/overlays/pve/left4dead2/addons
+# steam mkdir -p /opt/l4d2/overlays/100tick
+
+# install_tickrate_enabler 100tick
+
+# # server config
+# steam mkdir -p /opt/l4d2/overlays/100tick/left4dead2/cfg
+# steam cat <<'EOF' > /opt/l4d2/overlays/100tick/left4dead2/cfg/server.cfg
+# motd_enabled 0
+# sv_steamgroup "38347879"
+# sv_minrate 60000
+# sv_maxrate 0
+# EOF
+
+# -- OVERLAY COMPETITIVE REWORK WIP -- #
+
+# https://github.com/SirPlease/L4D2-Competitive-Rework
+
+# steam mkdir -p /opt/l4d2/overlays/competitive_rework
+# steam mkdir -p /opt/l4d2/overlays/competitive_rework/left4dead2
+# test -d /opt/l4d2/overlays/competitive_rework/left4dead2/README.md || \
+#     curl -L https://github.com/SirPlease/L4D2-Competitive-Rework/archive/refs/heads/master.zip | steam unzip -d /opt/l4d2/overlays/competitive_rework/left4dead2
+
+# # admin system
+# steam mkdir -p /opt/l4d2/overlays/pve/left4dead2/addons
+# test -f /opt/l4d2/overlays/pve/left4dead2/addons/2524204971.vpk || \
+#     steam /opt/l4d2/steam-workshop-download 2524204971 --out /opt/l4d2/overlays/pve/left4dead2/addons
+# steam mkdir -p "/opt/l4d2/overlays/pve/left4dead2/ems/admin system"
+# steam echo "STEAM_1:0:12376499" > "/opt/l4d2/overlays/pve/left4dead2/ems/admin system/admins.txt"
+
+# # ions vocalizer
+# test -f /opt/l4d2/overlays/pve/left4dead2/addons/698857882.vpk || \
+#     steam /opt/l4d2/steam-workshop-download 698857882 --out /opt/l4d2/overlays/pve/left4dead2/addons
+
+# test -f /opt/l4d2/overlays/pve/left4dead2/addons/1575673903.vpk || \
+#     steam /opt/l4d2/steam-workshop-download 1575673903 --out /opt/l4d2/overlays/pve/left4dead2/addons
 
 # -- SERVERS -- #
 
diff --git a/bundles/left4dead2/files/start b/bundles/left4dead2/files/start
index 4d64020..b05fd40 100644
--- a/bundles/left4dead2/files/start
+++ b/bundles/left4dead2/files/start
@@ -5,6 +5,7 @@ set -xeuo pipefail
 name=$1
 overlay=$2
 port=$3
+params=$4
 
 function steam() {
     # für systemd, damit es den prozess beenden kann
@@ -25,4 +26,4 @@ mount -t overlay overlay \
   -o "lowerdir=/opt/l4d2/overlays/$overlay:/opt/l4d2/installation,upperdir=/opt/l4d2/servers/$name/upper,workdir=/opt/l4d2/servers/$name/work" \
   "/opt/l4d2/servers/$name/merged"
 
-steam "/opt/l4d2/servers/$name/merged/srcds_run" -norestart -pidfile "/opt/l4d2/servers/$name/pid" -game left4dead2 -ip 0.0.0.0 -port "$port" +hostname "Crone_$name" +map c1m1_hotel
\ No newline at end of file
+steam "/opt/l4d2/servers/$name/merged/srcds_run" -norestart -pidfile "/opt/l4d2/servers/$name/pid" -game left4dead2 -ip 0.0.0.0 -port "$port" $params +hostname "Crone_$name" +map c1m1_hotel
\ No newline at end of file
diff --git a/bundles/left4dead2/items.py b/bundles/left4dead2/items.py
index fecec4d..8a9f6c7 100644
--- a/bundles/left4dead2/items.py
+++ b/bundles/left4dead2/items.py
@@ -1,6 +1,9 @@
 files = {
     '/opt/l4d2/setup': {
         'mode': '755',
+        'triggers': {
+            'svc_systemd:left4dead2-initialize.service:restart',
+        },
     },
     '/opt/l4d2/start': {
         'mode': '755',
@@ -12,6 +15,7 @@ svc_systemd = {
         'enabled': True,
         'running': None,
         'needs': {
+            'file:/opt/l4d2/setup',
             'file:/usr/local/lib/systemd/system/left4dead2-initialize.service',
         },
     },
@@ -27,5 +31,5 @@ for server_name in node.metadata.get('left4dead2').keys():
         'needs': {
             'svc_systemd:left4dead2-initialize.service',
             f'file:/usr/local/lib/systemd/system/left4dead2-{server_name}.service',
-        }
+        },
     }
diff --git a/bundles/left4dead2/metadata.py b/bundles/left4dead2/metadata.py
index 02c73c3..480ee0a 100644
--- a/bundles/left4dead2/metadata.py
+++ b/bundles/left4dead2/metadata.py
@@ -46,9 +46,13 @@ def server_units(metadata):
 
     for name, config in metadata.get('left4dead2').items():
         assert match(r'^[A-z0-9-_-]+$', name)
-        assert config["overlay"] in {'pve'}
+        assert config["overlay"] in {'pve', '100tick'}
         assert 27000 <= config["port"] <= 27100
 
+        params = config.get("params", "")
+        if config.get("tickrate"):
+            params += f" -tickrate {config['tickrate']}"
+
         units[f'left4dead2-{name}.service'] = {
             'Unit': {
                 'Description': f'left4dead2 server {name}',
@@ -57,7 +61,7 @@ def server_units(metadata):
             },
             'Service': {
                 'Type': 'simple',
-                'ExecStart': f'/opt/l4d2/start {name} {config["overlay"]} {config["port"]}',
+                'ExecStart': f'/opt/l4d2/start "{name}" "{config["overlay"]}" "{config["port"]}" "{params}"',
                 'Restart': 'on-failure',
                 'Nice': -10,
                 'CPUWeight': 200,
@@ -67,6 +71,9 @@ def server_units(metadata):
             'Install': {
                 'WantedBy': {'multi-user.target'},
             },
+            'triggers': {
+                f'svc_systemd:left4dead2-{name}.service:restart',
+            },
         }
 
     return {
diff --git a/bundles/systemd/items.py b/bundles/systemd/items.py
index 7816130..26cbf22 100644
--- a/bundles/systemd/items.py
+++ b/bundles/systemd/items.py
@@ -1,5 +1,8 @@
 from bundlewrap.utils.dicts import merge_dict
 
+files = {}
+svc_systemd = {}
+
 directories = {
     '/usr/local/lib/systemd/system': {
         'purge': True,
@@ -42,6 +45,9 @@ for name, unit in node.metadata.get('systemd/units').items():
     else:
         raise Exception(f'unknown type {extension}')
 
+    for attribute in ['needs', 'needed_by', 'triggers', 'triggered_by']:
+        if attribute in unit:
+            dependencies[attribute] = unit.pop(attribute)
 
     files[path] = {
         'content': repo.libs.systemd.generate_unitfile(unit),
diff --git a/nodes/ovh.secondary.py b/nodes/ovh.secondary.py
index f262978..6a94efb 100644
--- a/nodes/ovh.secondary.py
+++ b/nodes/ovh.secondary.py
@@ -34,10 +34,7 @@
             'server2': {
                 'overlay': 'pve',
                 'port': 27016,
-            },
-            'server3': {
-                'overlay': 'pve',
-                'port': 27017,
+                'tickrate': '100',
             },
         },
         'bind': {