diff --git a/code/modules/halo/Forerunner/Sentinel.dmi b/code/modules/halo/Forerunner/Sentinel.dmi
index 7f56a6869dc46..205291f3f2997 100644
Binary files a/code/modules/halo/Forerunner/Sentinel.dmi and b/code/modules/halo/Forerunner/Sentinel.dmi differ
diff --git a/code/modules/halo/Forerunner/heavy_sentinel_spawner.dmi b/code/modules/halo/Forerunner/heavy_sentinel_spawner.dmi
new file mode 100644
index 0000000000000..44c30d68d61a6
Binary files /dev/null and b/code/modules/halo/Forerunner/heavy_sentinel_spawner.dmi differ
diff --git a/code/modules/halo/Forerunner/sentinel.dm b/code/modules/halo/Forerunner/sentinel.dm
index 9f494fc2c3d63..0b06b7c48644d 100644
--- a/code/modules/halo/Forerunner/sentinel.dm
+++ b/code/modules/halo/Forerunner/sentinel.dm
@@ -127,6 +127,15 @@
 
 	return ..()
 
+/mob/living/simple_animal/hostile/sentinel/major
+	name = "Sentinel Major"
+	desc = "An automated defence drone made of advanced alien technology, this one seems to be a more advanced variant."
+	icon_state = "sentinel_major"
+	icon_living = "sentinel_major"
+	icon_dead = "sentinel_major_dead"
+	health = 200
+	maxHealth = 200
+
 /mob/living/simple_animal/hostile/sentinel/player_sentinel
 	name = "Sentinel"
 	desc = "An automated defence drone made of advanced alien technology. This one seems to posses some higher-thought functions."