diff --git a/code/controllers/subsystem/npcai.dm b/code/controllers/subsystem/npcai.dm
new file mode 100644
index 00000000000..f8fa3a5aa0f
--- /dev/null
+++ b/code/controllers/subsystem/npcai.dm
@@ -0,0 +1,24 @@
+SUBSYSTEM_DEF(npcai)
+    name = "NPC AI" // Simple AI controller, isolated from the SNPC one (NPCPool).
+    flags = SS_POST_FIRE_TIMING|SS_NO_INIT|SS_BACKGROUND
+    priority = FIRE_PRIORITY_NPC
+    runlevels = RUNLEVEL_GAME | RUNLEVEL_POSTGAME
+    var/list/simple_animal_list = list()
+
+/datum/controller/subsystem/npcai/stat_entry()
+	..("SimAnimals:[simple_animal_list.len]")
+
+/datum/controller/subsystem/npcai/fire(resumed = FALSE)
+    if(!resumed)
+        src.simple_animal_list = simple_animal_list.Copy()
+    for(var/mob/living/simple_animal/M in simple_animal_list)
+        if(istype(M) && !QDELETED(M))
+            if(!M.client && M.stat == CONSCIOUS)
+                M.process_ai() 
+            if(MC_TICK_CHECK)
+                return
+        else
+            simple_animal_list -= M
+
+/datum/controller/subsystem/npcai/Recover()
+    simple_animal_list = SSnpcai.simple_animal_list
\ No newline at end of file