diff --git a/test/api/v3/integration/user/POST-user_release_both.test.js b/test/api/v3/integration/user/POST-user_release_both.test.js
index 8c47d95dfe..047ea5a2c9 100644
--- a/test/api/v3/integration/user/POST-user_release_both.test.js
+++ b/test/api/v3/integration/user/POST-user_release_both.test.js
@@ -2,17 +2,34 @@ import {
   generateUser,
   translate as t,
 } from '../../../../helpers/api-integration/v3';
+import content from '../../../../../website/common/script/content/index';
 
 describe('POST /user/release-both', () => {
   let user;
   let animal = 'Wolf-Base';
+  const loadPets = () => {
+    let pets = {};
+    for (let p in content.pets) {
+      pets[p] = content.pets[p];
+      pets[p] = 5;
+    }
+    return pets;
+  };
+  const loadMounts = () => {
+    let mounts = {};
+    for (let m in content.pets) {
+      mounts[m] = content.pets[m];
+      mounts[m] = true;
+    }
+    return mounts;
+  };
 
   beforeEach(async () => {
     user = await generateUser({
       'items.currentMount': animal,
       'items.currentPet': animal,
-      'items.pets': {animal: 5},
-      'items.mounts': {animal: true},
+      'items.pets': loadPets(),
+      'items.mounts': loadMounts(),
     });
   });
 
diff --git a/test/api/v3/integration/user/POST-user_release_mounts.test.js b/test/api/v3/integration/user/POST-user_release_mounts.test.js
index 86391599f0..728aa99c8c 100644
--- a/test/api/v3/integration/user/POST-user_release_mounts.test.js
+++ b/test/api/v3/integration/user/POST-user_release_mounts.test.js
@@ -2,15 +2,25 @@ import {
   generateUser,
   translate as t,
 } from '../../../../helpers/api-integration/v3';
+import content from '../../../../../website/common/script/content/index';
 
 describe('POST /user/release-mounts', () => {
   let user;
   let animal = 'Wolf-Base';
 
+  const loadMounts = () => {
+    let mounts = {};
+    for (let m in content.pets) {
+      mounts[m] = content.pets[m];
+      mounts[m] = true;
+    }
+    return mounts;
+  };
+
   beforeEach(async () => {
     user = await generateUser({
       'items.currentMount': animal,
-      'items.mounts': {animal: true},
+      'items.mounts': loadMounts(),
     });
   });
 
diff --git a/test/api/v3/integration/user/POST-user_release_pets.test.js b/test/api/v3/integration/user/POST-user_release_pets.test.js
index a7f7b9b66f..35b8126a82 100644
--- a/test/api/v3/integration/user/POST-user_release_pets.test.js
+++ b/test/api/v3/integration/user/POST-user_release_pets.test.js
@@ -2,15 +2,25 @@ import {
   generateUser,
   translate as t,
 } from '../../../../helpers/api-integration/v3';
+import content from '../../../../../website/common/script/content/index';
 
 describe('POST /user/release-pets', () => {
   let user;
   let animal = 'Wolf-Base';
 
+  const loadPets = () => {
+    let pets = {};
+    for (let p in content.pets) {
+      pets[p] = content.pets[p];
+      pets[p] = 5;
+    }
+    return pets;
+  };
+
   beforeEach(async () => {
     user = await generateUser({
       'items.currentPet': animal,
-      'items.pets': {animal: 5},
+      'items.pets': loadPets(),
     });
   });
 
diff --git a/test/common/ops/releaseBoth.js b/test/common/ops/releaseBoth.js
index dab22cae60..880f62a316 100644
--- a/test/common/ops/releaseBoth.js
+++ b/test/common/ops/releaseBoth.js
@@ -14,10 +14,18 @@ describe('shared.ops.releaseBoth', () => {
 
   beforeEach(() => {
     user = generateUser();
+    for (let p in content.pets) {
+      user.items.pets[p] = content.pets[p];
+      user.items.pets[p] = 5;
+    }
+
+    for (let m in content.pets) {
+      user.items.mounts[m] = content.pets[m];
+      user.items.mounts[m] = true;
+    }
+
     user.items.currentMount = animal;
     user.items.currentPet = animal;
-    user.items.pets[animal] = 5;
-    user.items.mounts[animal] = true;
     user.balance = 1.5;
   });
 
@@ -34,7 +42,7 @@ describe('shared.ops.releaseBoth', () => {
   });
 
   it('grants triad bingo with gems', () => {
-    let [, message] = releaseBoth(user);
+    let message = releaseBoth(user)[1];
 
     expect(message).to.equal(i18n.t('mountsAndPetsReleased'));
     expect(user.achievements.triadBingoCount).to.equal(1);
@@ -45,27 +53,79 @@ describe('shared.ops.releaseBoth', () => {
     user.achievements.triadBingo = 1;
     user.achievements.triadBingoCount = 1;
 
-    let [, message] = releaseBoth(user);
+    let message = releaseBoth(user)[1];
 
     expect(message).to.equal(i18n.t('mountsAndPetsReleased'));
     expect(user.achievements.triadBingoCount).to.equal(2);
   });
 
+  it('does not grant triad bingo if any pet has not been previously found', () => {
+    let triadBingoCountBeforeRelease = user.achievements.triadBingoCount;
+    user.items.pets[animal] = -1;
+    let message = releaseBoth(user)[1];
+
+    expect(message).to.equal(i18n.t('mountsAndPetsReleased'));
+    expect(user.achievements.triadBingoCount).to.equal(triadBingoCountBeforeRelease);
+  });
+
   it('releases pets', () => {
-    let [, message] = releaseBoth(user);
+    let message = releaseBoth(user)[1];
 
     expect(message).to.equal(i18n.t('mountsAndPetsReleased'));
     expect(user.items.pets[animal]).to.be.empty;
     expect(user.items.mounts[animal]).to.equal(null);
   });
 
+  it('does not increment beastMasterCount if any pet is level 0 (released)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+    user.items.pets[animal] = 0;
+
+    releaseBoth(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
+
+  it('does not increment beastMasterCount if any pet is missing (null)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+    user.items.pets[animal] = null;
+    releaseBoth(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
+
+  it('does not increment beastMasterCount if any pet is missing (undefined)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+    delete user.items.pets[animal];
+    releaseBoth(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
+
   it('releases mounts', () => {
-    let [, message] = releaseBoth(user);
+    let message = releaseBoth(user)[1];
 
     expect(message).to.equal(i18n.t('mountsAndPetsReleased'));
     expect(user.items.mounts[animal]).to.equal(null);
   });
 
+  it('does not increase mountMasterCount achievement if mount is missing (null)', () => {
+    let mountMasterCountBeforeRelease = user.achievements.mountMasterCount;
+    user.items.mounts[animal] = null;
+
+    releaseBoth(user);
+
+    expect(user.achievements.mountMasterCount).to.equal(mountMasterCountBeforeRelease);
+  });
+
+  it('does not increase mountMasterCount achievement if mount is missing (undefined)', () => {
+    let mountMasterCountBeforeRelease = user.achievements.mountMasterCount;
+    delete user.items.mounts[animal];
+
+    releaseBoth(user);
+
+    expect(user.achievements.mountMasterCount).to.equal(mountMasterCountBeforeRelease);
+  });
+
   it('removes drop currentPet', () => {
     let petInfo = content.petInfo[user.items.currentPet];
     expect(petInfo.type).to.equal('drop');
diff --git a/test/common/ops/releaseMounts.js b/test/common/ops/releaseMounts.js
index fd67eeff68..dc8fbae7b4 100644
--- a/test/common/ops/releaseMounts.js
+++ b/test/common/ops/releaseMounts.js
@@ -14,8 +14,12 @@ describe('shared.ops.releaseMounts', () => {
 
   beforeEach(() => {
     user = generateUser();
+    for (let k in content.pets) {
+      user.items.mounts[k] = content.pets[k];
+      user.items.mounts[k] = true;
+    }
+
     user.items.currentMount = animal;
-    user.items.mounts[animal] = true;
     user.balance = 1;
   });
 
@@ -32,7 +36,7 @@ describe('shared.ops.releaseMounts', () => {
   });
 
   it('releases mounts', () => {
-    let [, message] = releaseMounts(user);
+    let message = releaseMounts(user)[1];
 
     expect(message).to.equal(i18n.t('mountsReleased'));
     expect(user.items.mounts[animal]).to.equal(null);
@@ -60,10 +64,27 @@ describe('shared.ops.releaseMounts', () => {
 
   it('increases mountMasterCount achievement', () => {
     releaseMounts(user);
-
     expect(user.achievements.mountMasterCount).to.equal(1);
   });
 
+  it('does not increase mountMasterCount achievement if mount is missing (null)', () => {
+    let mountMasterCountBeforeRelease = user.achievements.mountMasterCount;
+    user.items.mounts[animal] = null;
+
+    releaseMounts(user);
+
+    expect(user.achievements.mountMasterCount).to.equal(mountMasterCountBeforeRelease);
+  });
+
+  it('does not increase mountMasterCount achievement if mount is missing (undefined)', () => {
+    let mountMasterCountBeforeRelease = user.achievements.mountMasterCount;
+    delete user.items.mounts[animal];
+
+    releaseMounts(user);
+
+    expect(user.achievements.mountMasterCount).to.equal(mountMasterCountBeforeRelease);
+  });
+
   it('subtracts gems from balance', () => {
     releaseMounts(user);
 
diff --git a/test/common/ops/releasePets.js b/test/common/ops/releasePets.js
index 549916b147..62ab66c540 100644
--- a/test/common/ops/releasePets.js
+++ b/test/common/ops/releasePets.js
@@ -14,8 +14,12 @@ describe('shared.ops.releasePets', () => {
 
   beforeEach(() => {
     user = generateUser();
+    for (let k in content.pets) {
+      user.items.pets[k] = content.pets[k];
+      user.items.pets[k] = 5;
+    }
+
     user.items.currentPet = animal;
-    user.items.pets[animal] = 5;
     user.balance = 1;
   });
 
@@ -32,7 +36,7 @@ describe('shared.ops.releasePets', () => {
   });
 
   it('releases pets', () => {
-    let [, message] = releasePets(user);
+    let message = releasePets(user)[1];
 
     expect(message).to.equal(i18n.t('petsReleased'));
     expect(user.items.pets[animal]).to.equal(0);
@@ -69,4 +73,29 @@ describe('shared.ops.releasePets', () => {
 
     expect(user.achievements.beastMasterCount).to.equal(1);
   });
+
+  it('does not increment beastMasterCount if any pet is level 0 (released)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+
+    user.items.pets[animal] = 0;
+    releasePets(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
+
+  it('does not increment beastMasterCount if any pet is missing (null)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+    user.items.pets[animal] = null;
+    releasePets(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
+
+  it('does not increment beastMasterCount if any pet is missing (undefined)', () => {
+    let beastMasterCountBeforeRelease = user.achievements.beastMasterCount;
+    delete user.items.pets[animal];
+    releasePets(user);
+
+    expect(user.achievements.beastMasterCount).to.equal(beastMasterCountBeforeRelease);
+  });
 });
diff --git a/website/common/script/ops/releaseBoth.js b/website/common/script/ops/releaseBoth.js
index 541c6d2e24..39b27e8926 100644
--- a/website/common/script/ops/releaseBoth.js
+++ b/website/common/script/ops/releaseBoth.js
@@ -14,6 +14,8 @@ module.exports = function releaseBoth (user, req = {}, analytics) {
   }
 
   let giveTriadBingo = true;
+  let giveBeastMasterAchievement = true;
+  let giveMountMasterAchievement = true;
 
   if (!user.achievements.triadBingo) {
     if (analytics) {
@@ -44,21 +46,30 @@ module.exports = function releaseBoth (user, req = {}, analytics) {
   for (animal in content.pets) {
     if (user.items.pets[animal] === -1) {
       giveTriadBingo = false;
+    } else if (!user.items.pets[animal]) {
+      giveBeastMasterAchievement = false;
+    }
+    if (user.items.mounts[animal] === null || user.items.mounts[animal] === undefined) {
+      giveMountMasterAchievement = false;
     }
 
     user.items.pets[animal] = 0;
     user.items.mounts[animal] = null;
   }
 
-  if (!user.achievements.beastMasterCount) {
-    user.achievements.beastMasterCount = 0;
+  if (giveBeastMasterAchievement) {
+    if (!user.achievements.beastMasterCount) {
+      user.achievements.beastMasterCount = 0;
+    }
+    user.achievements.beastMasterCount++;
   }
-  user.achievements.beastMasterCount++;
 
-  if (!user.achievements.mountMasterCount) {
-    user.achievements.mountMasterCount = 0;
+  if (giveMountMasterAchievement) {
+    if (!user.achievements.mountMasterCount) {
+      user.achievements.mountMasterCount = 0;
+    }
+    user.achievements.mountMasterCount++;
   }
-  user.achievements.mountMasterCount++;
 
   if (giveTriadBingo) {
     if (!user.achievements.triadBingoCount) {
diff --git a/website/common/script/ops/releaseMounts.js b/website/common/script/ops/releaseMounts.js
index a4b2e5dee1..0f7159502e 100644
--- a/website/common/script/ops/releaseMounts.js
+++ b/website/common/script/ops/releaseMounts.js
@@ -11,6 +11,8 @@ module.exports = function releaseMounts (user, req = {}, analytics) {
 
   user.balance -= 1;
 
+  let giveMountMasterAchievement = true;
+
   let mountInfo = content.mountInfo[user.items.currentMount];
 
   if (mountInfo && mountInfo.type === 'drop') {
@@ -18,13 +20,18 @@ module.exports = function releaseMounts (user, req = {}, analytics) {
   }
 
   for (let mount in content.pets) {
+    if (user.items.mounts[mount] === null || user.items.mounts[mount] === undefined) {
+      giveMountMasterAchievement = false;
+    }
     user.items.mounts[mount] = null;
   }
 
-  if (!user.achievements.mountMasterCount) {
-    user.achievements.mountMasterCount = 0;
+  if (giveMountMasterAchievement) {
+    if (!user.achievements.mountMasterCount) {
+      user.achievements.mountMasterCount = 0;
+    }
+    user.achievements.mountMasterCount++;
   }
-  user.achievements.mountMasterCount++;
 
   if (analytics) {
     analytics.track('release mounts', {
diff --git a/website/common/script/ops/releasePets.js b/website/common/script/ops/releasePets.js
index c84e7c9959..6a356b8629 100644
--- a/website/common/script/ops/releasePets.js
+++ b/website/common/script/ops/releasePets.js
@@ -11,6 +11,8 @@ module.exports = function releasePets (user, req = {}, analytics) {
 
   user.balance -= 1;
 
+  let giveBeastMasterAchievement = true;
+
   let petInfo = content.petInfo[user.items.currentPet];
 
   if (petInfo && petInfo.type === 'drop') {
@@ -18,13 +20,18 @@ module.exports = function releasePets (user, req = {}, analytics) {
   }
 
   for (let pet in content.pets) {
+    if (!user.items.pets[pet]) {
+      giveBeastMasterAchievement = false;
+    }
     user.items.pets[pet] = 0;
   }
 
-  if (!user.achievements.beastMasterCount) {
-    user.achievements.beastMasterCount = 0;
+  if (giveBeastMasterAchievement) {
+    if (!user.achievements.beastMasterCount) {
+      user.achievements.beastMasterCount = 0;
+    }
+    user.achievements.beastMasterCount++;
   }
-  user.achievements.beastMasterCount++;
 
   if (analytics) {
     analytics.track('release pets', {