diff --git a/limboai/bt_always_fail.cpp b/limboai/bt_always_fail.cpp
new file mode 100644
index 0000000..6dc112c
--- /dev/null
+++ b/limboai/bt_always_fail.cpp
@@ -0,0 +1,10 @@
+/* bt_always_fail.cpp */
+
+#include "bt_always_fail.h"
+
+int BTAlwaysFail::_tick(float p_delta) {
+	if (get_child(0)->execute(p_delta) == RUNNING) {
+		return RUNNING;
+	}
+	return FAILURE;
+}
diff --git a/limboai/bt_always_fail.h b/limboai/bt_always_fail.h
new file mode 100644
index 0000000..e67a101
--- /dev/null
+++ b/limboai/bt_always_fail.h
@@ -0,0 +1,16 @@
+/* bt_always_fail.h */
+
+#ifndef BT_ALWAYS_FAIL_H
+#define BT_ALWAYS_FAIL_H
+
+#include "bt_decorator.h"
+#include "core/object.h"
+
+class BTAlwaysFail : public BTDecorator {
+	GDCLASS(BTAlwaysFail, BTDecorator);
+
+protected:
+	virtual int _tick(float p_delta);
+};
+
+#endif // BT_ALWAYS_FAIL_H
\ No newline at end of file
diff --git a/limboai/bt_always_succeed.cpp b/limboai/bt_always_succeed.cpp
new file mode 100644
index 0000000..a7beb03
--- /dev/null
+++ b/limboai/bt_always_succeed.cpp
@@ -0,0 +1,10 @@
+/* bt_always_succeed.cpp */
+
+#include "bt_always_succeed.h"
+
+int BTAlwaysSucceed::_tick(float p_delta) {
+	if (get_child(0)->execute(p_delta) == RUNNING) {
+		return RUNNING;
+	}
+	return SUCCESS;
+}
diff --git a/limboai/bt_always_succeed.h b/limboai/bt_always_succeed.h
new file mode 100644
index 0000000..58a4179
--- /dev/null
+++ b/limboai/bt_always_succeed.h
@@ -0,0 +1,16 @@
+/* bt_always_succeed.h */
+
+#ifndef BT_ALWAYS_SUCCEED_H
+#define BT_ALWAYS_SUCCEED_H
+
+#include "bt_decorator.h"
+#include "core/object.h"
+
+class BTAlwaysSucceed : public BTDecorator {
+	GDCLASS(BTAlwaysSucceed, BTDecorator);
+
+protected:
+	virtual int _tick(float p_delta);
+};
+
+#endif // BT_ALWAYS_SUCCEED_H
\ No newline at end of file
diff --git a/limboai/bt_delay.cpp b/limboai/bt_delay.cpp
new file mode 100644
index 0000000..53153f1
--- /dev/null
+++ b/limboai/bt_delay.cpp
@@ -0,0 +1,29 @@
+/* bt_delay.cpp */
+
+#include "bt_delay.h"
+#include "core/array.h"
+#include "core/class_db.h"
+#include "core/object.h"
+#include "core/variant.h"
+
+String BTDelay::_generate_name() const {
+	return vformat("Delay %ss", seconds);
+}
+
+void BTDelay::_enter() {
+	time_passed = 0.0;
+}
+
+int BTDelay::_tick(float p_delta) {
+	time_passed += p_delta;
+	if (time_passed <= seconds) {
+		return RUNNING;
+	}
+	return get_child(0)->execute(p_delta);
+}
+
+void BTDelay::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_seconds", "p_value"), &BTDelay::set_seconds);
+	ClassDB::bind_method(D_METHOD("get_seconds"), &BTDelay::get_seconds);
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "seconds"), "set_seconds", "get_seconds");
+}
diff --git a/limboai/bt_delay.h b/limboai/bt_delay.h
new file mode 100644
index 0000000..1919445
--- /dev/null
+++ b/limboai/bt_delay.h
@@ -0,0 +1,31 @@
+/* bt_delay.h */
+
+#ifndef BT_DELAY
+#define BT_DELAY
+
+#include "bt_decorator.h"
+#include "core/object.h"
+
+class BTDelay : public BTDecorator {
+	GDCLASS(BTDelay, BTDecorator);
+
+private:
+	float seconds = 1.0;
+	float time_passed = 0.0;
+
+protected:
+	static void _bind_methods();
+
+	virtual String _generate_name() const;
+	virtual void _enter();
+	virtual int _tick(float p_delta);
+
+public:
+	void set_seconds(float p_value) {
+		seconds = p_value;
+		emit_changed();
+	};
+	float get_seconds() const { return seconds; };
+};
+
+#endif // BT_DELAY
\ No newline at end of file
diff --git a/limboai/bt_invert.cpp b/limboai/bt_invert.cpp
new file mode 100644
index 0000000..7bf90ef
--- /dev/null
+++ b/limboai/bt_invert.cpp
@@ -0,0 +1,13 @@
+/* bt_invert.cpp */
+
+#include "bt_invert.h"
+
+int BTInvert::_tick(float p_delta) {
+	int status = get_child(0)->execute(p_delta);
+	if (status == SUCCESS) {
+		status = FAILURE;
+	} else if (status == FAILURE) {
+		status = SUCCESS;
+	}
+	return status;
+}
\ No newline at end of file
diff --git a/limboai/bt_invert.h b/limboai/bt_invert.h
new file mode 100644
index 0000000..6f8875a
--- /dev/null
+++ b/limboai/bt_invert.h
@@ -0,0 +1,16 @@
+/* bt_invert.h */
+
+#ifndef BT_INVERT_H
+#define BT_INVERT_H
+
+#include "bt_decorator.h"
+#include "core/object.h"
+
+class BTInvert : public BTDecorator {
+	GDCLASS(BTInvert, BTDecorator);
+
+protected:
+	virtual int _tick(float p_delta);
+};
+
+#endif // BT_INVERT_H
\ No newline at end of file
diff --git a/limboai/register_types.cpp b/limboai/register_types.cpp
index 813b14f..050b873 100644
--- a/limboai/register_types.cpp
+++ b/limboai/register_types.cpp
@@ -5,9 +5,13 @@
 #include "core/class_db.h"
 
 #include "bt_action.h"
+#include "bt_always_fail.h"
+#include "bt_always_succeed.h"
 #include "bt_composite.h"
 #include "bt_condition.h"
 #include "bt_decorator.h"
+#include "bt_delay.h"
+#include "bt_invert.h"
 #include "bt_parallel.h"
 #include "bt_selector.h"
 #include "bt_sequence.h"
@@ -24,6 +28,10 @@ void register_limboai_types() {
 	ClassDB::register_class<BTSequence>();
 	ClassDB::register_class<BTSelector>();
 	ClassDB::register_class<BTParallel>();
+	ClassDB::register_class<BTInvert>();
+	ClassDB::register_class<BTAlwaysFail>();
+	ClassDB::register_class<BTAlwaysSucceed>();
+	ClassDB::register_class<BTDelay>();
 	LimboStringNames::create();
 }