Implements identity system! If your mask hides your face (e.g. oxygen mask, clown mask and diving suit), the game will either use the name of the ID card owner in your ID card slot or will give you a "?" name.

This only affects "DisplayName". The reason why I can't completely override the .Name for the client from server is due to how crew manifest and CharacterInfo classes are handled - it would require a major rework of many Character-related systems and interactions to truly make this "hack-proof".
Server hosts will have to stay on their toes I guess.

Barotrauma/BarotraumaClient/Source/Characters/Character.cs

@@ -298,15 +298,16 @@ namespace Barotrauma
 
             if (info != null)
             {
-                Vector2 namePos = new Vector2(pos.X, pos.Y - 110.0f - (5.0f / cam.Zoom)) - GUI.Font.MeasureString(Info.Name) * 0.5f / cam.Zoom;
+                string name = Info.DisplayName;
+                Vector2 namePos = new Vector2(pos.X, pos.Y - 110.0f - (5.0f / cam.Zoom)) - GUI.Font.MeasureString(name) * 0.5f / cam.Zoom;
                 Color nameColor = Color.White;
 
                 if (Character.Controlled != null && TeamID != Character.Controlled.TeamID)
                 {
                     nameColor = Color.Red;
                 }
-                GUI.Font.DrawString(spriteBatch, Info.Name, namePos + new Vector2(1.0f / cam.Zoom, 1.0f / cam.Zoom), Color.Black, 0.0f, Vector2.Zero, 1.0f / cam.Zoom, SpriteEffects.None, 0.001f);
-                GUI.Font.DrawString(spriteBatch, Info.Name, namePos, nameColor, 0.0f, Vector2.Zero, 1.0f / cam.Zoom, SpriteEffects.None, 0.0f);
+                GUI.Font.DrawString(spriteBatch, name, namePos + new Vector2(1.0f / cam.Zoom, 1.0f / cam.Zoom), Color.Black, 0.0f, Vector2.Zero, 1.0f / cam.Zoom, SpriteEffects.None, 0.001f);
+                GUI.Font.DrawString(spriteBatch, name, namePos, nameColor, 0.0f, Vector2.Zero, 1.0f / cam.Zoom, SpriteEffects.None, 0.0f);
 
                 if (GameMain.DebugDraw)
                 {

Barotrauma/BarotraumaClient/Source/Characters/CharacterHUD.cs

@@ -208,7 +208,7 @@ namespace Barotrauma
                     string focusName = character.FocusedCharacter.SpeciesName;
                     if (character.FocusedCharacter.Info != null)
                     {
-                        focusName = character.FocusedCharacter.Info.Name;
+                        focusName = character.FocusedCharacter.Info.DisplayName;
                     }
                     Vector2 textPos = startPos;
                     textPos -= new Vector2(GUI.Font.MeasureString(focusName).X / 2, 20);

Barotrauma/BarotraumaClient/Source/Items/Inventory.cs

@@ -296,9 +296,26 @@ namespace Barotrauma
                     }
                     else
                     {
-                        toolTip = string.IsNullOrEmpty(Items[i].Description) ?
+                        string description = Items[i].Description;
+                        if (Items[i].Name == "ID Card")
+                        {
+                            string[] readTags = Items[i].Tags.Split(',');
+                            string idName = null;
+                            string idJob = null;
+                            foreach (string tag in readTags)
+                            {
+                                string[] s = tag.Split(':');
+                                if (s[0] == "name")
+                                    idName = s[1];
+                                if (s[0] == "job")
+                                    idJob = s[1];
+                            }
+                            if (idName != null)
+                                description = "This belongs to " + idName + (idJob != null ? ", the " + idJob + ".\n" : ".\n") + description;
+                        }
+                        toolTip = string.IsNullOrEmpty(description) ?
                             Items[i].Name :
-                            Items[i].Name + '\n' + Items[i].Description;
+                            Items[i].Name + '\n' + description;
                     }
 
                     DrawToolTip(spriteBatch, toolTip, slots[i].Rect);

Barotrauma/BarotraumaShared/Content/Items/Diving/divinggear.xml

@@ -41,7 +41,7 @@
 
     <Wearable limbtype="Head" slots="Any,Face">
       <sprite texture="DivingMask.png" limb="Head" sourcerect="1,1,37,38"/>
-      <StatusEffect type="OnWearing" target="Character" ObstructVision="true" setvalue="true" disabledeltatime="true"/>
+      <StatusEffect type="OnWearing" target="Character" HideFace="true" ObstructVision="true" setvalue="true" disabledeltatime="true"/>
       <StatusEffect type="OnWearing" target="Contained,Character" OxygenAvailable="1000.0" Condition="-0.5">
         <RequiredItem type="Contained" name="Oxygen Tank"/>
       </StatusEffect>
@@ -92,7 +92,7 @@
       <sprite texture="DivingSuit.png" limb="RightFoot" sourcerect="30,100,20,25" origin="0.5,0.5" depth="0.13" inheritlimbdepth="false" hidelimb="true"/>
       <sprite texture="DivingSuit.png" limb="LeftFoot" sourcerect="30,100,20,25" origin="0.5,0.5" depth="0.13" inheritlimbdepth="false" hidelimb="true"/>
 
-      <StatusEffect type="OnWearing" target="Character" ObstructVision="true" PressureProtection="100.0" SpeedMultiplier="0.6" LowPassMultiplier="0.2" setvalue="true" disabledeltatime="true"/>
+      <StatusEffect type="OnWearing" target="Character" HideFace="true" ObstructVision="true" PressureProtection="100.0" SpeedMultiplier="0.6" LowPassMultiplier="0.2" setvalue="true" disabledeltatime="true"/>
       <StatusEffect type="OnWearing" target="Contained,Character"  OxygenAvailable="1000.0" Condition="-0.5">
         <RequiredItem type="Contained" name="Oxygen Tank"/>
       </StatusEffect>

Barotrauma/BarotraumaShared/Content/Items/Jobgear/misc.xml

@@ -38,6 +38,7 @@
 
     <Wearable limbtype="Head" slots="Any,Face">
       <sprite texture="clownmask.png" limb="Head" origin="0.5,0.5"/>
+      <StatusEffect type="OnWearing" target="Character" HideFace="true"/>
     </Wearable>
   </Item>
 

Barotrauma/BarotraumaShared/Content/Items/Tools/tools.xml

@@ -197,8 +197,8 @@
     <Body width="60" height="10" density="50"/>
 
     <MeleeWeapon slots="Any,RightHand,LeftHand"
-          aimpos="50,0" handle1="-5,0" holdangle="30" reload="1.8">
-      <Attack damage="15" stun="0.4" damagetype="Blunt" sound="Content/Items/Weapons/smack.ogg"/>
+          aimpos="50,0" handle1="-5,0" holdangle="30" reload="1.7">
+      <Attack damage="10" stun="0.4" damagetype="Blunt" sound="Content/Items/Weapons/smack.ogg"/>
     </MeleeWeapon>
   </Item>
 

Barotrauma/BarotraumaShared/Source/Characters/Character.cs

@@ -139,6 +139,19 @@ namespace Barotrauma
             }
         }
 
+        private float hideFaceTimer;
+        public bool HideFace
+        {
+            get
+            {
+                return hideFaceTimer > 0.0f;
+            }
+            set
+            {
+                hideFaceTimer = MathHelper.Clamp(hideFaceTimer + (value ? 1.0f : -0.5f), 0.0f, 10.0f);
+            }
+        }
+
         public string ConfigPath
         {
             get;
@@ -1406,6 +1419,8 @@ namespace Barotrauma
                     item.Submarine = Submarine;
                 }
             }
+
+            HideFace = false;
                         
             if (isDead) return;
 

Barotrauma/BarotraumaShared/Source/Characters/CharacterInfo.cs

@@ -12,7 +12,34 @@ namespace Barotrauma
     partial class CharacterInfo
     {
         public string Name;
-
+        public string DisplayName
+        {
+            get {
+                string disguiseName = "?";
+                if (Character != null && Character.HideFace)
+                {
+                    if (Character.Inventory != null)
+                    {
+                        var idCard = Character.Inventory.FindItem("ID Card");
+                        if (idCard != null && Character.Inventory.IsInLimbSlot(idCard, InvSlotType.Card)) //Disguise as the ID card name if it's equipped
+                        {
+                            string[] readTags = idCard.Tags.Split(',');
+                            foreach (string tag in readTags)
+                            {
+                                string[] s = tag.Split(':');
+                                if (s[0] == "name")
+                                {
+                                    disguiseName = s[1];
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    return disguiseName;
+                }
+                return Name;
+            }
+        }
         public Character Character;
 
         public readonly string File;

Barotrauma/BarotraumaShared/Source/Characters/Jobs/Job.cs

@@ -130,7 +130,8 @@ namespace Barotrauma
                 {
                     item.AddTag(s);
                 }
-                item.Description = "This belongs to " + character.Name + ", the " + Name + ".";
+                item.AddTag("name:" + character.Name);
+                item.AddTag("job:" + Name);
             }
             
             if (parentItem != null) parentItem.Combine(item);