diff --git a/Runtime/MP1/World/CThardus.cpp b/Runtime/MP1/World/CThardus.cpp
index ea956ef19..66fd52b40 100644
--- a/Runtime/MP1/World/CThardus.cpp
+++ b/Runtime/MP1/World/CThardus.cpp
@@ -908,7 +908,7 @@ void CThardus::LoopedAttack(CStateManager& mgr, EStateMsg msg, float arg) {
     } else if (x658_ == 0) {
       zeus::CVector3f dir = (mgr.GetPlayer().GetTranslation() - GetTranslation()).normalized();
       zeus::CVector2f vec = sub801dac30(mgr);
-      if (vec == zeus::skZero2f) {
+      if (vec != zeus::skZero2f) {
         x650_ = vec;
       } else {
         x650_ = dir.toVec2f().normalized();
@@ -1585,7 +1585,7 @@ zeus::CVector2f CThardus::sub801dc60c(float arg, CStateManager& mgr) {
     }
   }
 
-  if (ret != zeus::skZero2f) {
+  if (ret == zeus::skZero2f) {
     return x45c_steeringBehaviors.Arrival(*this, x7d8_, 0.f).toVec2f();
   }
 
diff --git a/Runtime/MP1/World/CThardus.hpp b/Runtime/MP1/World/CThardus.hpp
index c1113d297..74e835fd6 100644
--- a/Runtime/MP1/World/CThardus.hpp
+++ b/Runtime/MP1/World/CThardus.hpp
@@ -64,7 +64,7 @@ class CThardus : public CPatterned {
   float x6a4_;
   float x6a8_;
   float x6ac_;
-  std::vector<bool> x6b0_; /* TODO: Determine real value */
+  std::vector<bool> x6b0_;
   std::vector<TUniqueId> x6c0_rockLights;
   CAssetId x6d0_;
   CAssetId x6d4_;
@@ -157,7 +157,7 @@ class CThardus : public CPatterned {
   void sub801dc444(CStateManager& mgr, const zeus::CVector3f& pos, CAssetId particle);
   void sub801dbc5c(CStateManager& mgr, CDestroyableRock* rock);
   void sub801dbbdc(CStateManager& mgr, CDestroyableRock* rock);
-  bool sub801dc2c8() { return (x610_destroyableRocks.size() - 1) > x648_currentRock; }
+  bool sub801dc2c8() { return x648_currentRock == (x610_destroyableRocks.size() - 1); }
   void UpdateNonDestroyableCollisionActorMaterials(EUpdateMaterialMode mode, EMaterialTypes mat, CStateManager& mgr);
   void UpdateExcludeList(const std::unique_ptr<CCollisionActorManager>& colMgr, EUpdateMaterialMode mode,
                          EMaterialTypes mat, CStateManager& mgr);
@@ -243,7 +243,7 @@ public:
   bool AggressionCheck(CStateManager& mgr, float arg) override { return x330_stateMachineState.GetTime() > 0.1f; }
   bool AttackOver(CStateManager& mgr, float arg) override { return true; }
   bool ShouldTaunt(CStateManager& mgr, float arg) override { return false; }
-  bool ShouldMove(CStateManager& mgr, float arg) override { return x68c_ < x578_waypoints.size() || x93b_; }
+  bool ShouldMove(CStateManager& mgr, float arg) override { return x68c_ < x574_ || x93b_; }
   bool StartAttack(CStateManager& mgr, float arg) override { return true; }
   bool CodeTrigger(CStateManager& mgr, float arg) override { return x95c_doCodeTrigger; }
   bool IsDizzy(CStateManager& mgr, float arg) override { return x330_stateMachineState.GetTime() > 4.f; }