diff --git a/src/game/item-tooltip.ts b/src/game/item-tooltip.ts
index 7cb4a5d..88812de 100644
--- a/src/game/item-tooltip.ts
+++ b/src/game/item-tooltip.ts
@@ -2021,7 +2021,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
       if (uniqDef.levelreq > 0) affixReqLevel = Math.max(affixReqLevel, uniqDef.levelreq)
       if (item.rolledProps && item.rolledProps.length > 0) {
         rawProps.push(...item.rolledProps)
-      } else {
+      } else if (Array.isArray(uniqDef.props)) {
         for (const prop of uniqDef.props) {
           if (prop.code) {
             rawProps.push({
@@ -2057,7 +2057,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
       if (setDef.levelreq > 0) affixReqLevel = Math.max(affixReqLevel, setDef.levelreq)
       if (item.rolledProps && item.rolledProps.length > 0) {
         rawProps.push(...item.rolledProps)
-      } else {
+      } else if (Array.isArray(setDef.props)) {
         for (const prop of setDef.props) {
           if (prop.code) {
             rawProps.push({
@@ -2094,7 +2094,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
       title = enName
       subTitle = baseNameEn
     }
-    if (rareDef && rareDef.affixes) {
+    if (rareDef && Array.isArray(rareDef.affixes)) {
       for (const aff of rareDef.affixes) {
         const effReq = getAffixEffectiveLevelReq(aff, itemClass)
         if (effReq > 0) affixReqLevel = Math.max(affixReqLevel, effReq)
@@ -2111,17 +2111,19 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
           value: p.value,
         })
       }
-    } else if (rareDef && rareDef.affixes) {
+    } else if (rareDef && Array.isArray(rareDef.affixes)) {
       for (const aff of rareDef.affixes) {
-        for (const mod of aff.mods) {
-          const keepRange = NON_RANDOM_RANGE_CODES.has(mod.code.toLowerCase()) || (mod.min === 0 && mod.max === 0)
-          rawProps.push({
-            code: mod.code,
-            param: mod.param,
-            min: keepRange ? mod.min : mod.value,
-            max: keepRange ? mod.max : mod.value,
-            value: mod.value,
-          })
+        if (Array.isArray(aff.mods)) {
+          for (const mod of aff.mods) {
+            const keepRange = NON_RANDOM_RANGE_CODES.has(mod.code.toLowerCase()) || (mod.min === 0 && mod.max === 0)
+            rawProps.push({
+              code: mod.code,
+              param: mod.param,
+              min: keepRange ? mod.min : mod.value,
+              max: keepRange ? mod.max : mod.value,
+              value: mod.value,
+            })
+          }
         }
       }
     }
@@ -2157,7 +2159,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
         const effReq = getAffixEffectiveLevelReq(magicDef.suffix, itemClass)
         if (effReq > 0) affixReqLevel = Math.max(affixReqLevel, effReq)
       }
-      if (magicDef.affixes) {
+      if (Array.isArray(magicDef.affixes)) {
         for (const aff of magicDef.affixes) {
           const effReq = getAffixEffectiveLevelReq(aff, itemClass)
           if (effReq > 0) affixReqLevel = Math.max(affixReqLevel, effReq)
@@ -2176,7 +2178,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
         })
       }
     } else if (magicDef) {
-      if (magicDef.prefix) {
+      if (magicDef.prefix && Array.isArray(magicDef.prefix.mods)) {
         for (const m of magicDef.prefix.mods) {
           const keepRange = NON_RANDOM_RANGE_CODES.has(m.code.toLowerCase()) || (m.min === 0 && m.max === 0)
           rawProps.push({
@@ -2188,7 +2190,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
           })
         }
       }
-      if (magicDef.suffix) {
+      if (magicDef.suffix && Array.isArray(magicDef.suffix.mods)) {
         for (const m of magicDef.suffix.mods) {
           const keepRange = NON_RANDOM_RANGE_CODES.has(m.code.toLowerCase()) || (m.min === 0 && m.max === 0)
           rawProps.push({
@@ -2288,7 +2290,7 @@ export function formatItemTooltip(item: Item, locale: TooltipLocale = getTooltip
     }
     if (item.rolledProps && item.rolledProps.length > 0) {
       rawProps.push(...item.rolledProps)
-    } else if ((item as any).runeword?.props) {
+    } else if (Array.isArray((item as any).runeword?.props)) {
       for (const prop of (item as any).runeword.props) {
         if (prop.code) {
           rawProps.push({