diff --git a/assets/common/items/armor/brinestone/crown.ron b/assets/common/items/armor/brinestone/crown.ron
index dfa2b57d61..8e79f6ad4a 100644
--- a/assets/common/items/armor/brinestone/crown.ron
+++ b/assets/common/items/armor/brinestone/crown.ron
@@ -5,7 +5,7 @@ ItemDef(
         kind: Head,
         stats: Direct((
             protection: Some(Normal(8.0)),
-            poise_resilence: Some(Normal(4.0)),
+            poise_resilience: Some(Normal(4.0)),
             energy_reward: Some(0.15),
             precision_power: Some(-0.05),
         )),
diff --git a/assets/common/items/keys/bone_key.ron b/assets/common/items/keys/bone_key.ron
index 7b291c103d..80b43b8760 100644
--- a/assets/common/items/keys/bone_key.ron
+++ b/assets/common/items/keys/bone_key.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: Common,
     tags: [Utility],
 )
diff --git a/assets/common/items/keys/glass_key.ron b/assets/common/items/keys/glass_key.ron
index 697ace156d..7a67dd26c0 100644
--- a/assets/common/items/keys/glass_key.ron
+++ b/assets/common/items/keys/glass_key.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: Common,
     tags: [Utility],
 )
diff --git a/assets/common/items/keys/haniwa_key.ron b/assets/common/items/keys/haniwa_key.ron
index 720b811338..43bdebf47d 100644
--- a/assets/common/items/keys/haniwa_key.ron
+++ b/assets/common/items/keys/haniwa_key.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: Common,
     tags: [Utility],
 )
diff --git a/assets/common/items/keys/quarry_keys/ancient.ron b/assets/common/items/keys/quarry_keys/ancient.ron
index 7fdc11e473..00f3aa453c 100644
--- a/assets/common/items/keys/quarry_keys/ancient.ron
+++ b/assets/common/items/keys/quarry_keys/ancient.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/backdoor.ron b/assets/common/items/keys/quarry_keys/backdoor.ron
index 4d6e38bfb8..91b34924a1 100644
--- a/assets/common/items/keys/quarry_keys/backdoor.ron
+++ b/assets/common/items/keys/quarry_keys/backdoor.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/cyclops_eye.ron b/assets/common/items/keys/quarry_keys/cyclops_eye.ron
index 4a4bfe80eb..fe2ee4e7b0 100644
--- a/assets/common/items/keys/quarry_keys/cyclops_eye.ron
+++ b/assets/common/items/keys/quarry_keys/cyclops_eye.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/flamekeeper_left.ron b/assets/common/items/keys/quarry_keys/flamekeeper_left.ron
index e1942bb862..579662e728 100644
--- a/assets/common/items/keys/quarry_keys/flamekeeper_left.ron
+++ b/assets/common/items/keys/quarry_keys/flamekeeper_left.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/flamekeeper_right.ron b/assets/common/items/keys/quarry_keys/flamekeeper_right.ron
index 50c0cd51ae..1cd24b7f6c 100644
--- a/assets/common/items/keys/quarry_keys/flamekeeper_right.ron
+++ b/assets/common/items/keys/quarry_keys/flamekeeper_right.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/overseer.ron b/assets/common/items/keys/quarry_keys/overseer.ron
index 38f6bfea19..d901fa5af6 100644
--- a/assets/common/items/keys/quarry_keys/overseer.ron
+++ b/assets/common/items/keys/quarry_keys/overseer.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/quarry_keys/smelting.ron b/assets/common/items/keys/quarry_keys/smelting.ron
index 7f4d4d0b4c..6389e24ba5 100644
--- a/assets/common/items/keys/quarry_keys/smelting.ron
+++ b/assets/common/items/keys/quarry_keys/smelting.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: High,
     tags: [],
 )
diff --git a/assets/common/items/keys/rusty_tower_key.ron b/assets/common/items/keys/rusty_tower_key.ron
index bb6ad976c6..7c2d1b3f7b 100644
--- a/assets/common/items/keys/rusty_tower_key.ron
+++ b/assets/common/items/keys/rusty_tower_key.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: Epic,
     tags: [],
 )
diff --git a/assets/common/items/tool/instruments/shamisen.ron b/assets/common/items/tool/instruments/shamisen.ron
index c47c36c6ec..05f2c42366 100644
--- a/assets/common/items/tool/instruments/shamisen.ron
+++ b/assets/common/items/tool/instruments/shamisen.ron
@@ -9,7 +9,6 @@ ItemDef(
             power: 0.0,
             effect_power: 1.0,
             speed: 1.0,
-            crit_chance: 0.0,
             range: 0.0,
             energy_efficiency: 1.0,
             buff_strength: 1.0,
diff --git a/assets/common/items/tool/instruments/steeldrum.ron b/assets/common/items/tool/instruments/steeldrum.ron
index e89409ae17..1ac5589729 100644
--- a/assets/common/items/tool/instruments/steeldrum.ron
+++ b/assets/common/items/tool/instruments/steeldrum.ron
@@ -9,7 +9,6 @@ ItemDef(
             power: 0.0,
             effect_power: 1.0,
             speed: 1.0,
-            crit_chance: 0.0,
             range: 0.0,
             energy_efficiency: 1.0,
             buff_strength: 1.0,
diff --git a/assets/common/items/utility/coins.ron b/assets/common/items/utility/coins.ron
index 61cb50ab87..a3a253b367 100644
--- a/assets/common/items/utility/coins.ron
+++ b/assets/common/items/utility/coins.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Coins,
     ),
-    amount: 1,
     quality: Common,
     tags: [],
 )
diff --git a/assets/common/items/utility/collar.ron b/assets/common/items/utility/collar.ron
index 365b2c10ec..a97a019942 100644
--- a/assets/common/items/utility/collar.ron
+++ b/assets/common/items/utility/collar.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Collar,
     ),
-    amount: 1,
     quality: Moderate,
     tags: [Utility],
 )
diff --git a/assets/common/items/utility/lockpick_0.ron b/assets/common/items/utility/lockpick_0.ron
index 51bd2e3da6..1df602e701 100644
--- a/assets/common/items/utility/lockpick_0.ron
+++ b/assets/common/items/utility/lockpick_0.ron
@@ -4,7 +4,6 @@ ItemDef(
     kind: Utility(
         kind: Key,
     ),
-    amount: 1,
     quality: Common,
     tags: [Utility],
 )
diff --git a/common/src/combat.rs b/common/src/combat.rs
index 371ec66297..2b77be0e8c 100644
--- a/common/src/combat.rs
+++ b/common/src/combat.rs
@@ -982,6 +982,7 @@ const SLASHING_ENERGY_FRACTION: f32 = 0.5;
 const CRUSHING_POISE_FRACTION: f32 = 1.0;
 
 #[derive(Copy, Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct Damage {
     pub source: DamageSource,
     pub kind: DamageKind,
diff --git a/common/src/comp/aura.rs b/common/src/comp/aura.rs
index 212c73365d..5f462a97c3 100644
--- a/common/src/comp/aura.rs
+++ b/common/src/comp/aura.rs
@@ -141,6 +141,7 @@ impl Auras {
 }
 
 #[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq)]
+#[serde(deny_unknown_fields)]
 pub struct AuraBuffConstructor {
     pub kind: BuffKind,
     pub strength: f32,
diff --git a/common/src/comp/health.rs b/common/src/comp/health.rs
index 2476169571..3837166bb2 100644
--- a/common/src/comp/health.rs
+++ b/common/src/comp/health.rs
@@ -8,6 +8,7 @@ use std::{convert::TryFrom, ops::Mul};
 
 /// Specifies what and how much changed current health
 #[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq)]
+#[serde(deny_unknown_fields)]
 pub struct HealthChange {
     /// The amount of the health change, negative is damage, positive is healing
     pub amount: f32,
diff --git a/common/src/comp/inventory/item/armor.rs b/common/src/comp/inventory/item/armor.rs
index f85213d88f..7778c26afa 100644
--- a/common/src/comp/inventory/item/armor.rs
+++ b/common/src/comp/inventory/item/armor.rs
@@ -99,6 +99,7 @@ impl Friction {
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize, Default)]
+#[serde(deny_unknown_fields)]
 pub struct Stats {
     /// Protection is non-linearly transformed (following summation) to a damage
     /// reduction using (prot / (60 + prot))
@@ -232,6 +233,7 @@ impl PartialOrd for Protection {
 }
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct Armor {
     pub kind: ArmorKind,
     pub stats: StatsSource,
diff --git a/common/src/comp/inventory/item/mod.rs b/common/src/comp/inventory/item/mod.rs
index c59db7dc19..f6e84da511 100644
--- a/common/src/comp/inventory/item/mod.rs
+++ b/common/src/comp/inventory/item/mod.rs
@@ -57,6 +57,7 @@ pub enum Utility {
 }
 
 #[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct Lantern {
     color: Rgb<u32>,
     strength_thousandths: u32,
@@ -335,6 +336,7 @@ impl Effects {
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub enum ItemKind {
     /// Something wieldable
     Tool(Tool),
@@ -875,7 +877,7 @@ impl assets::Compound for ItemDef {
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(rename = "ItemDef")]
+#[serde(rename = "ItemDef", deny_unknown_fields)]
 struct RawItemDef {
     legacy_name: String,
     legacy_description: String,
diff --git a/common/src/comp/inventory/item/modular.rs b/common/src/comp/inventory/item/modular.rs
index 29be4079f3..f7ab0fad51 100644
--- a/common/src/comp/inventory/item/modular.rs
+++ b/common/src/comp/inventory/item/modular.rs
@@ -236,6 +236,7 @@ impl ModularBase {
 }
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub enum ModularComponent {
     ToolPrimaryComponent {
         toolkind: ToolKind,
diff --git a/common/src/effect.rs b/common/src/effect.rs
index c55b338b71..cc61ec6e85 100644
--- a/common/src/effect.rs
+++ b/common/src/effect.rs
@@ -12,6 +12,7 @@ pub enum Effect {
 
 /// A buff that may be applied to an entity
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
+#[serde(deny_unknown_fields)]
 pub struct BuffEffect {
     pub kind: comp::BuffKind,
     pub data: comp::BuffData,