diff --git a/src/org/apollo/game/model/Item.java b/src/org/apollo/game/model/Item.java
index d969d43f..c1526d15 100644
--- a/src/org/apollo/game/model/Item.java
+++ b/src/org/apollo/game/model/Item.java
@@ -2,6 +2,8 @@ package org.apollo.game.model;
 
 import org.apollo.game.model.def.ItemDefinition;
 
+import com.google.common.base.MoreObjects;
+
 /**
  * Represents a single item.
  * 
@@ -78,7 +80,7 @@ public final class Item {
 
 	@Override
 	public String toString() {
-		return Item.class.getName() + " [id=" + id + ", amount=" + amount + "]";
+		return MoreObjects.toStringHelper(this).add("id", id).add("amount", amount).toString();
 	}
 
 }
\ No newline at end of file
diff --git a/src/org/apollo/game/model/entity/GameObject.java b/src/org/apollo/game/model/entity/GameObject.java
index 30095298..3d27b8a0 100644
--- a/src/org/apollo/game/model/entity/GameObject.java
+++ b/src/org/apollo/game/model/entity/GameObject.java
@@ -3,6 +3,8 @@ package org.apollo.game.model.entity;
 import org.apollo.game.model.Position;
 import org.apollo.game.model.def.ObjectDefinition;
 
+import com.google.common.base.MoreObjects;
+
 /**
  * Represents an object in the game world.
  * 
@@ -12,12 +14,12 @@ import org.apollo.game.model.def.ObjectDefinition;
 public final class GameObject extends Entity {
 
 	/**
-	 * The config value that stores the object's id, type, and orientation.
+	 * The packed value that stores this object's id, type, and orientation.
 	 */
-	private final int config;
+	private final int packed;
 
 	/**
-	 * Creates a game object.
+	 * Creates the game object.
 	 * 
 	 * @param id The object's id.
 	 * @param position The position.
@@ -26,7 +28,7 @@ public final class GameObject extends Entity {
 	 */
 	public GameObject(int id, Position position, int type, int orientation) {
 		super(position);
-		this.config = (id * 256) + (type * 4) + orientation;
+		this.packed = id << 8 | type << 2 | orientation;
 	}
 
 	/**
@@ -49,7 +51,7 @@ public final class GameObject extends Entity {
 	 * @return The id.
 	 */
 	public int getId() {
-		return config / 256;
+		return packed >> 8;
 	}
 
 	/**
@@ -58,7 +60,7 @@ public final class GameObject extends Entity {
 	 * @return The orientation.
 	 */
 	public int getRotation() {
-		return config & 0x3;
+		return packed & 0x3;
 	}
 
 	/**
@@ -67,13 +69,13 @@ public final class GameObject extends Entity {
 	 * @return The type.
 	 */
 	public int getType() {
-		return (config >> 2) & 0x3F;
+		return (packed >> 2) & 0x3F;
 	}
 
 	@Override
 	public String toString() {
-		return GameObject.class.getName() + " [id=" + getId() + ", type=" + getType() + ", rotation=" + getRotation()
-				+ "]";
+		return MoreObjects.toStringHelper(this).add("id", getId()).add("type", getType()).add("rotation", getRotation())
+				.toString();
 	}
 
 }
\ No newline at end of file
diff --git a/src/org/apollo/game/model/entity/Npc.java b/src/org/apollo/game/model/entity/Npc.java
index 2fc521e4..26b8e6e1 100644
--- a/src/org/apollo/game/model/entity/Npc.java
+++ b/src/org/apollo/game/model/entity/Npc.java
@@ -4,6 +4,9 @@ import org.apollo.game.model.Position;
 import org.apollo.game.model.def.NpcDefinition;
 import org.apollo.game.sync.block.SynchronizationBlock;
 
+import com.google.common.base.MoreObjects;
+import com.google.common.base.Preconditions;
+
 /**
  * An {@link Npc} is a {@link Mob} that is not being controlled by a player.
  * 
@@ -81,15 +84,13 @@ public final class Npc extends Mob {
 	 * @param boundary The boundary.
 	 */
 	public void setBoundary(Position[] boundary) {
-		if (boundary.length != 4) {
-			throw new IllegalArgumentException("Boundary count must be 4.");
-		}
+		Preconditions.checkArgument(boundary.length == 4, "Boundary count must be 4.");
 		this.boundary = boundary;
 	}
 
 	@Override
 	public String toString() {
-		return "[" + Npc.class.getName() + ": id=" + definition.getId() + ", name=" + definition.getName() + "]";
+		return MoreObjects.toStringHelper(this).add("id", definition.getId()).add("name", definition.getName()).toString();
 	}
 
 	/**
@@ -98,9 +99,7 @@ public final class Npc extends Mob {
 	 * @param id The id.
 	 */
 	public void transform(int id) {
-		if (id < 0 || id >= NpcDefinition.count()) {
-			throw new IllegalArgumentException("Id to transform to is out of bounds.");
-		}
+		Preconditions.checkArgument(id >= 0 && id < NpcDefinition.count(), "Id to transform to is out of bounds.");
 		definition = NpcDefinition.lookup(this.id = id);
 		blockSet.add(SynchronizationBlock.createTransformBlock(id));
 	}
diff --git a/src/org/apollo/game/model/entity/Player.java b/src/org/apollo/game/model/entity/Player.java
index ff4ee403..8078eafa 100644
--- a/src/org/apollo/game/model/entity/Player.java
+++ b/src/org/apollo/game/model/entity/Player.java
@@ -40,6 +40,8 @@ import org.apollo.net.session.GameSession;
 import org.apollo.security.PlayerCredentials;
 import org.apollo.util.Point;
 
+import com.google.common.base.MoreObjects;
+
 /**
  * A {@link Player} is a {@link Mob} that a user is controlling.
  * 
@@ -912,8 +914,8 @@ public final class Player extends Mob {
 
 	@Override
 	public String toString() {
-		return Player.class.getName() + " [username=" + getUsername() + ", privilege=" + privilegeLevel + ", clientVersion="
-				+ clientVersion + "]";
+		return MoreObjects.toStringHelper(this).add("username", getUsername()).add("privilege", privilegeLevel)
+				.add("client version", clientVersion).toString();
 	}
 
 	/**
diff --git a/src/org/apollo/game/model/entity/WalkingQueue.java b/src/org/apollo/game/model/entity/WalkingQueue.java
index ef6f35fd..fa70f042 100644
--- a/src/org/apollo/game/model/entity/WalkingQueue.java
+++ b/src/org/apollo/game/model/entity/WalkingQueue.java
@@ -7,6 +7,8 @@ import java.util.Queue;
 import org.apollo.game.model.Direction;
 import org.apollo.game.model.Position;
 
+import com.google.common.base.MoreObjects;
+
 /**
  * A queue of {@link Direction}s which a {@link Mob} will follow.
  * 
@@ -44,7 +46,7 @@ public final class WalkingQueue {
 
 		@Override
 		public String toString() {
-			return Point.class.getName() + " [direction=" + direction + ", position=" + position + "]";
+			return MoreObjects.toStringHelper(this).add("direction", direction).add("position", position).toString();
 		}
 
 	}
diff --git a/src/org/apollo/game/model/entity/attr/AttributeMap.java b/src/org/apollo/game/model/entity/attr/AttributeMap.java
index f816ab46..fd404de3 100644
--- a/src/org/apollo/game/model/entity/attr/AttributeMap.java
+++ b/src/org/apollo/game/model/entity/attr/AttributeMap.java
@@ -3,82 +3,82 @@ package org.apollo.game.model.entity.attr;
 import java.util.HashMap;
 import java.util.Map;
 
+import com.google.common.base.Preconditions;
+
 /**
- * A {@link Map} wrapper used to store {@link Attribute Attributes} and their {@link AttributeDefinition definitions}.
+ * A {@link Map} wrapper used to store {@link Attribute}s and their {@link AttributeDefinition definitions}.
  * 
  * @author Major
  */
 public final class AttributeMap {
 
-    /**
-     * The map of attribute names to definitions.
-     */
-    private static Map<String, AttributeDefinition<?>> definitions = new HashMap<>(50);
+	/**
+	 * The map of attribute names to definitions.
+	 */
+	private static Map<String, AttributeDefinition<?>> definitions = new HashMap<>(50);
 
-    /**
-     * Registers an {@link AttributeDefinition}.
-     * 
-     * @param name The name of the attribute.
-     * @param definition The definition.
-     */
-    public static void addDefinition(String name, AttributeDefinition<?> definition) {
-	definitions.put(name, definition);
-    }
-
-    /**
-     * Gets the {@link AttributeDefinition} with the specified name, or {@code null} if it is not defined.
-     * 
-     * @param name The name of the attribute.
-     * @return The attribute definition.
-     */
-    public static AttributeDefinition<?> getDefinition(String name) {
-	return definitions.get(name);
-    }
-
-    /**
-     * Gets the {@link AttributeDefinition}s, as a {@link Map}.
-     * 
-     * @return The map of attribute names to definitions.
-     */
-    public static Map<String, AttributeDefinition<?>> getDefinitions() {
-	return new HashMap<>(definitions);
-    }
-
-    /**
-     * The map of attribute names to attributes.
-     */
-    private Map<String, Attribute<?>> attributes = new HashMap<>();
-
-    /**
-     * Gets the {@link Attribute} with the specified name.
-     * 
-     * @param name The name of the attribute.
-     * @return The attribute.
-     */
-    public Attribute<?> getAttribute(String name) {
-	return attributes.get(name);
-    }
-
-    /**
-     * Gets a shallow copy of the map of attributes.
-     * 
-     * @return The attributes.
-     */
-    public Map<String, Attribute<?>> getAttributes() {
-	return new HashMap<>(attributes);
-    }
-
-    /**
-     * Sets the value of the {@link Attribute} with the specified name.
-     * 
-     * @param name The name of the attribute.
-     * @param attribute The attribute.
-     */
-    public void setAttribute(String name, Attribute<?> attribute) {
-	if (getDefinition(name) == null) {
-	    throw new IllegalArgumentException("Attributes must be defined before their value can be set.");
+	/**
+	 * Registers an {@link AttributeDefinition}.
+	 * 
+	 * @param name The name of the attribute.
+	 * @param definition The definition.
+	 */
+	public static void addDefinition(String name, AttributeDefinition<?> definition) {
+		definitions.put(name, definition);
+	}
+
+	/**
+	 * Gets the {@link AttributeDefinition} with the specified name, or {@code null} if it is not defined.
+	 * 
+	 * @param name The name of the attribute.
+	 * @return The attribute definition.
+	 */
+	public static AttributeDefinition<?> getDefinition(String name) {
+		return definitions.get(name);
+	}
+
+	/**
+	 * Gets the {@link AttributeDefinition}s, as a {@link Map}.
+	 * 
+	 * @return The map of attribute names to definitions.
+	 */
+	public static Map<String, AttributeDefinition<?>> getDefinitions() {
+		return new HashMap<>(definitions);
+	}
+
+	/**
+	 * The map of attribute names to attributes.
+	 */
+	private Map<String, Attribute<?>> attributes = new HashMap<>();
+
+	/**
+	 * Gets the {@link Attribute} with the specified name.
+	 * 
+	 * @param name The name of the attribute.
+	 * @return The attribute.
+	 */
+	public Attribute<?> getAttribute(String name) {
+		return attributes.get(name);
+	}
+
+	/**
+	 * Gets a shallow copy of the {@link Map} of {@link Attribute}s.
+	 * 
+	 * @return The attributes.
+	 */
+	public Map<String, Attribute<?>> getAttributes() {
+		return new HashMap<>(attributes);
+	}
+
+	/**
+	 * Sets the value of the {@link Attribute} with the specified name.
+	 * 
+	 * @param name The name of the attribute.
+	 * @param attribute The attribute.
+	 */
+	public void setAttribute(String name, Attribute<?> attribute) {
+		Preconditions.checkNotNull(getDefinition(name), "Attributes must be defined before their value can be set.");
+		attributes.put(name, attribute);
 	}
-	attributes.put(name, attribute);
-    }
 
 }
\ No newline at end of file