diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Character.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Character.java
index de5db8e..b03ad35 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Character.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Character.java
@@ -2,6 +2,8 @@ package uulm.teamname.marvelous.gamelibrary.entities;
 
 import uulm.teamname.marvelous.gamelibrary.IntVector2;
 
+import java.util.Objects;
+
 /** Represents a playable character inside a match. */
 public class Character extends Entity {
     /** The name of the character */
@@ -72,4 +74,33 @@ public class Character extends Entity {
         clone.ap.setValue(ap.getValue());
         return clone;
     }
+
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        if (!super.equals(o)) return false;
+        Character character = (Character) o;
+        return attackRange == character.attackRange && rangedDamage == character.rangedDamage && meleeDamage == character.meleeDamage && Objects.equals(name, character.name) && Objects.equals(hp, character.hp) && Objects.equals(mp, character.mp) && Objects.equals(ap, character.ap) && Objects.equals(inventory, character.inventory);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), name, hp, mp, ap, attackRange, rangedDamage, meleeDamage, inventory);
+    }
+
+    @Override
+    public String toString() {
+        return "Character{" +
+                "name='" + name + '\'' +
+                ", hp=" + hp +
+                ", mp=" + mp +
+                ", ap=" + ap +
+                ", attackRange=" + attackRange +
+                ", rangedDamage=" + rangedDamage +
+                ", meleeDamage=" + meleeDamage +
+                ", inventory=" + inventory +
+                '}';
+    }
 }
diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/InfinityStone.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/InfinityStone.java
index 0b6089a..6f59f4c 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/InfinityStone.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/InfinityStone.java
@@ -2,6 +2,8 @@ package uulm.teamname.marvelous.gamelibrary.entities;
 
 import uulm.teamname.marvelous.gamelibrary.IntVector2;
 
+import java.util.Objects;
+
 /** Represents an infinity stone {@link Entity}. Can only exist on the map. */
 public class InfinityStone extends Entity {
     /** The {@link StoneType} of the infinity stone */
@@ -24,4 +26,26 @@ public class InfinityStone extends Entity {
     public InfinityStone clone() {
         return new InfinityStone(id, position, type);
     }
+
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        if (!super.equals(o)) return false;
+        InfinityStone that = (InfinityStone) o;
+        return type == that.type;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), type);
+    }
+
+    @Override
+    public String toString() {
+        return "InfinityStone{" +
+                "type=" + type +
+                '}';
+    }
 }
diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Inventory.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Inventory.java
index 6c13d0e..420cbc4 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Inventory.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Inventory.java
@@ -3,6 +3,7 @@ package uulm.teamname.marvelous.gamelibrary.entities;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.Objects;
 
 /** Represents an inventory of 6 slots of {@link StoneType}s that can be manipulated. */
 public class Inventory implements Iterable<StoneType> {
@@ -79,4 +80,27 @@ public class Inventory implements Iterable<StoneType> {
     public Iterator<StoneType> iterator() {
         return content.iterator();
     }
+
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Inventory that = (Inventory) o;
+        return size == that.size && Objects.equals(content, that.content);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(size, content);
+    }
+
+
+    @Override
+    public String toString() {
+        return "Inventory{" +
+                "size=" + size +
+                ", content=" + content +
+                '}';
+    }
 }
diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Rock.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Rock.java
index 0c73035..ba7e94d 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Rock.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Rock.java
@@ -2,6 +2,8 @@ package uulm.teamname.marvelous.gamelibrary.entities;
 
 import uulm.teamname.marvelous.gamelibrary.IntVector2;
 
+import java.util.Objects;
+
 /** Represents a rock entity on the map. */
 public class Rock extends Entity {
     /** The maximum hp of the rock */
@@ -38,4 +40,29 @@ public class Rock extends Entity {
         clone.hp = hp;
         return clone;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        if (!super.equals(o)) return false;
+        Rock rock = (Rock) o;
+        return maxHP == rock.maxHP && hp == rock.hp;
+    }
+
+
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), maxHP, hp);
+    }
+
+
+    @Override
+    public String toString() {
+        return "Rock{" +
+                "maxHP=" + maxHP +
+                ", hp=" + hp +
+                '}';
+    }
 }
diff --git a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Stat.java b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Stat.java
index 7d64c55..0ff4a2b 100644
--- a/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Stat.java
+++ b/src/main/java/uulm/teamname/marvelous/gamelibrary/entities/Stat.java
@@ -1,5 +1,7 @@
 package uulm.teamname.marvelous.gamelibrary.entities;
 
+import java.util.Objects;
+
 /** Represents a stat property of a {@link Character}. */
 public class Stat {
     /** The {@link StatType} of the stat */
@@ -37,4 +39,27 @@ public class Stat {
     public void decreaseValue(int value) {
         this.value -= value;
     }
+
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Stat stat = (Stat) o;
+        return max == stat.max && value == stat.value && type == stat.type;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type, max, value);
+    }
+
+    @Override
+    public String toString() {
+        return "Stat{" +
+                "type=" + type +
+                ", max=" + max +
+                ", value=" + value +
+                '}';
+    }
 }