Ghost (bonus)

:''"Ghost" redirects here. For Achievements and Trophies (DX3)|Deus Ex: Human Revolution achievement, see Ghost (achievement).''

'''Ghost''' is a stealth-related XP bonus in ''Deus Ex: Human Revolution'' and its The Missing Link|DLC. It is awarded along with "Getting Things Done" XP bonus for completing some of the main mission objectives, if the player met a certain set of criteria. This page is dedicated to revealing Ghost (bonus)#AI reactions|all these restrictions (including the ones that have no impact on this rating).

There are 3 general rules for qualifying for Ghost rating:
#Do not be seen by hostile humans or bots. This does not include being seen ''briefly'' (without radar going red) when enemies become simply ''alarmed''. Radar going ''Normal→Hostile'' or ''Alarmed→Hostile'' is usually a good indicator that Ghost bonus was ruined — but not always.
#Do not physically touch an enemy, except when performing a takedown and do not move objects in such a way that enemy may spot you (i.e. do not hold objects in front of enemies, even when cloaked).
#Do not let human enemies (including bots) see their allies' bodies or bots exploding.

Ghost is worth 500 XP. Receiving a Ghost bonus for a first time will earn the player the Ghost (achievement)|Ghost achievement. Smooth Operator is another stealth-related XP bonus in ''Deus Ex: Human Revolution'' (with its own set of rules).

==AI reactions==
This section is dedicated to revealing the enemies' reactions to different player's actions and their effect on Ghost rating.
===Notation===

*'''Enemy''' — a human enemy or a bot (Automated security bot|security bot and 80-X Boxguard|boxguard). Bots have the same AI as humans, so most of the rules apply to them too. Take note that bots reprogrammed to ''friendly'' status with Augmentations_(DX3) Domination aug treat the bodies of their former allies the same way as if they were hostile to the player, meaning that if bot sees a body it will ruin Ghost rating regardless of bot's status. ''Friendly'' bots and turrets can be destroyed by the player, even from within the bot's field of view, without affecting Ghost status (so long as no other Ghost cancellation trigger is met). Turret turret 3|Turrets have very simple AI and do not affect any stealth ratings, so they are not included in this definition and examined separately.
*'''Enemy states''' (as they appear on a radar) and states they transit into:
**Normal (gray)
**Suspicious (yellow) →Normal: applies only to cameras and turrets (when they spot the player briefly).
**Alarmed (orange) Lasts until enemy investigates the disturbance → Normal: caused by small, innocuous disturbances. Even if several enemies witness the disturbance only one of them will stay alarmed and check it.
**High Alert (orange) Lasts 80 seconds → Normal: caused by more aggressive players' actions. Vision range increases to 50 meters (from normal 19 meters). Enemies in this state are much more cautious: they usually run to check the disturbances when alarmed by player's actions and try to cover each other if two or more enemies hear the noise made by the player. Enemies can also alert others while in this state.
**Permanent Alert (orange): appears only in scripted situations (Alice Garden Pods, TYM Penthouse, Picus, Rifleman Bank Station). It is, basically, the permanent "High Alert" state.
**Hostile (red) Lasts 40 seconds → High Alert → Normal: lasts until the time runs out or until an enemy gets disturbed again.
*'''FOV''' — field of view (vision cone).
*'''Investigate''' — standard action: enemy goes to a place of a disturbance, does a 360 degrees look around, returns to a relaxed state and returns to his position.
*'''x''' in "Ghost" column — shows that corresponding action cancels the Ghost bonus.

===Player-initiated actions===
{| class="wikitable" style="width: 100%; text-align: center;"
! scope="col"|Action
! scope="col"|Conditions
! scope="col"|Enemy State
! scope="col"|Enemy Reaction
! scope="col"|Ghost
|- style="color:white;"
|Being seen by an enemy
|<0,3–1 seconds, proportional to distance from an enemy
|Alarmed
|Investigate
|
|- style="color:white;"
|Being seen by an enemy
|>1 second
|Hostile
|Attack
|x
|- style="color:white;"
|Bumping into an enemy
|uncloaked/cloaked
|Hostile
|Attack
|x
|- style="color:white;"
|Moving an object with ''Use'' button
|inside enemy's FOV + behind the object
|Hostile
|Attack
|x
|- style="color:white;"
|Nudging an object (inside enemy's FOV)
|uncloaked/cloaked + behind the object
|Normal
|No reaction
|
|- style="color:white;"
|Nudging an object (inside enemy's FOV)
|cloaked + in position where enemy could possibly see the player without the cloak
|Hostile
|Attack
|x
|- style="color:white;"
|Producing a noise
|jump, run, hit something with physical object, hit something with a weapon's projectile
|Alarmed
|Investigate
|
|- style="color:white;"
|Opening a door
|Door is inside enemy's FOV and/or audible range
|Alarmed
|Investigate
|
|- style="color:white;"
|Hitting something with a physical object
|inside enemy's FOV
|Alarmed
|Investigate a place object was thrown from
|
|- style="color:white;"
|Breaking a window
|
|High Alert
|Investigate
|
|- style="color:white;"
|Breaking a fragile wall
|inside/outside enemy's FOV
|High Alert
|Investigate
|
|- style="color:white;"
|Shooting a gun (non-silenced/silenced, inside enemy's FOV)
|blind fire from cover, uncloaked
|Hostile
|Attack
|x
|- style="color:white;"
|Shooting a gun (non-silenced/silenced, inside enemy's FOV)
|cloaked
|Hostile
|Attack/Investigate
|
|- style="color:white;"
|Doing Icarus stun
|
|Hostile
|Stunned (9 seconds)
|
|}

===Enemy-initiated actions===

{| class="wikitable" style="width: 100%; text-align: center;"
! scope="col"|Event
! scope="col"|Conditions
! scope="col"|Enemy State
! scope="col"|Enemy Reaction
! scope="col"|Ghost
|- style="color:white;"
|Hearing a gunshot
|non-silenced <50 m, depending on weapon, silenced <1 m
|High Alert
|Investigate
|
|- style="color:white;"
|Hearing a turret's gunfire
|
|Hostile
|Investigates player's last known location (as seen by a turret)
|
|- style="color:white;"
|Receiving damage
|regardless of damage source
|Hostile
|Attack damage source (including non-friendly turret/bot)
|
|- style="color:white;"
|Seeing a body
|dead
|High Alert
|Trigger an alarm
|x
|- style="color:white;"
|Seeing a body
|unconscious
|High Alert
|Trigger an alarm, Wake up an unconscious ally
|x
|- style="color:white;"
|Hearing a death scream
|
|High Alert
|Trigger an Alarm, Investigate
|
|- style="color:white;"
|Seeing a bot/turret explode
|
|High Alert
|Trigger an alarm
|x
|- style="color:white;"
|Seeing a thrown mine/grenade/UR-DED
|<4 m distance
|High Alert
|
|
|- style="color:white;"
|Hearing an explosion (grenade, mine, UR-DED, barrel, gas canister)
|
|High Alert
|Trigger an alarm, Investigate
|
|- style="color:white;"
|Seeing an explosion (grenade, mine, UR-DED, barrel, gas canister)
|
|High Alert
|Trigger an alarm, Investigate
|
|- style="color:white;"
|Getting caught in a concussion grenade explosion
|
|Hostile
|Gets stunned (9 seconds)
|
|- style="color:white;"
|Getting caught in a gas grenade explosion
|
|Hostile
|Gets knocked out (after 3–5 seconds)
|
|}

===Turrets reactions===

{| class="wikitable" style="width: 100%; text-align: center;"
! scope="col"|Event
! scope="col"|Conditions
! scope="col"|Enemy State
! scope="col"|Enemy Reaction
! scope="col"|Ghost
|- style="color:white;"
|Seeing the player
|regardless of distance <1 second
|Suspicious → Hostile if it loses sight of the player → Normal
|
|
|- style="color:white;"
|Seeing the player
|for a long period >1 second
|Hostile
|Open fire
|
|}

===Misconceptions===
There are some misconceptions regarding ''certain actions'' supposedly canceling Ghost, which turn out to be a completely distinct issue or not an issue at all.

For example:
*'''Enemy turning hostile''': seeing ''hostile'' appear on radar is not 100% guarantee for losing Ghost. There is a lot of cases where this does not apply, like when enemy is stunned by a grenade or Icarus stun, or gassed, or even hurt by the player. Likewise, in case of ''enemies seeing bodies'' no one turns hostile and yet that still affects Ghost.
*'''Shooting an enemy without killing''': what happens when you shoot an enemy is that 1) he turns hostile (no effect on Ghost) 2) he quickly turns in the direction the damage came from 3) ''he sees the player'' — it is the third action that cancels Ghost here. Quickly hiding after shooting will do the trick (but may lead to enemies triggering an alarm as a reaction to gunfire, if there are alarm panels nearby). Also, being cloaked and shooting at enemy while standing in front of him is perfectly fine — you may even see the ''last known position'' indicator appear and enemies may open fire on your last known position — and all this still won't cancel the Ghost rating by itself.
*'''Reprogrammed turret killing enemies''': it is a combination of enemies hearing turret's gunfire, coming to investigate it and ''seeing the bodies of killed allies'' that ruins Ghost in this case. As long as turret is used to kill the last standing enemy, or a lone boxguard, for example, Ghost will be fine.

==List of objectives in Deus Ex: Human Revolution that award Ghost bonus==

There are 29 Ghost bonuses available in the Deus Ex: Human Revolution (30 with You Scratch My Back, I'll Scratch Yours|additional mission from Deus Ex: Human Revolution Preorder Packs Mission Pack|Explosive Mission Pack DLC).

As the case with Smooth Operator bonus there are some objectives in the game that have two mutually exclusive ways of resolving them, meaning sometimes it's possible to earn either Silver Tongue bonus or Ghost bonus, but not both. To see which way is more profitable XP-wise consult the Experience by area (DX3)|Experience by area page.

===Sarif Manufacturing Plant===
*M1 - Securing Sarif's Manufacturing Plant
**'''1)''' Enter the main building
**'''2)''' Enter the server room
*M2 - Neutralize the Terrorist Leader
**'''3)''' Confront Zeke Sanders

===Detroit Police Station===
*M5 - Investigating the Suicide Terrorist
**'''4) '''Retrieve the dead terrorist's Neural Hub. Ghost and Silver Tongue bonuses for this objective are mutually exclusive.

===Derelict Row===
*M7 - Stopping the Transmission
**'''5)''' Locate and shut down antenna in Derelict Row

===Highland Park===
*M10 - Following the Clues in Highland Park
**'''6)''' Infiltrate the Mercenary Compound
**'''7)''' Locate the Mercenary Leader

===Hengsha Court Gardens===
*M1 - Hunting the Hacker
**'''8) '''Investigate the penthouse apartment

===The Hive===
*M1 - Hunting the Hacker
**'''9)''' Find and speak with Tong Si Hung. Note that as in the Police Station, Ghost and Silver Tongue bonuses here are mutually exclusive.

===Alice Garden Pods===
*M2 - Gaining Access to Tai Yong Medical
**'''10)''' Escape the Alice Garden Pods ambush

===Tai Yong Medical===
*M1 - Searching for Proof
**'''11)''' Enter TYM's tower by passing through the Pangu
**'''12)''' Find and view Van Bruggen's recording
*M2 - Entering the Dragon's Lair
**'''13)''' Confront Zhao in the Penthouse
**'''14)''' Escape and get to the hangar
**'''15) '''Open the hangar bay doors

===Picus===
*M1 - Confronting Eliza Cassan
**'''16)''' Escape the ambush by reaching the lower floor
**'''17)''' Get to the funicular
**'''18)''' Summon the funicular
**'''19) '''Get inside room 802-11

===Detroit - second visit===
*M2 - Finding Isaias Sandoval
**'''20)''' Obtain Sandoval's location from Taggart. There are two ways to handle this objective: either convince Taggart or hack his computer. And though the Smooth Operator bonus can be earned for either of them, the Ghost bonus will be given ''only'' for hacking.
**'''21)''' Find and confront Sandoval

===Hengsha - second visit===
*M2 - Find Vasili Sevchenko's GPL Device
**'''22)''' Escape the construction site
*M3 - You Scratch My Back, I'll Scratch Yours (DLC)
**'''23)''' Rescue Tong's son
*M4 - Stowing Away
**'''24)''' Retrieve Tong's Package from the Shed
**'''25)''' Place the C4 on Administrator Wang's Desk

===Omega Ranch===
*M1 - Rescuing Megan and Her Team
**'''26)''' Search for Signs of Megan's Team
**'''27)''' Disable the Signal Jammer
**'''28) '''Upload a virus to the security computer and enter the restricted area

===Panchaea===
*M1 - Shutting Down Darrow's Signal
**'''29)''' Get inside the tower and disengage the lockdown
**'''30)''' Reach the Broadcast Center

==Bugs==
There is a bug present in both console versions and the recent PC build (v1.4.651.0) of the original game, including The Missing Link (1.0.62.9), where (among other things) some Ghost and Smooth Operator bonuses may not be awarded to certain players when they complete an objective stealthily (see http://www.youtube.com/watch?v=D1zsARl0Gq4 this video for an illustration). The details about causes and occurrences are not clear, but it seems that it has something to do with save game files of former playthroughs. If you're not getting a bonus you think you '''should''' get, you're most probably affected by the bug. It is '''strongly recommended''' to remove all save game information before starting a new playthrough. For PC users, the files are located at '''.../Steam/userdata/*UID*/28050/''' for the original game and at '''.../Steam/userdata/*UID*/201280/'''for The Missing Link. For affected Console users, creating a new profile for each playthrough seems to be the way to go.
Category:Deus Ex: Human Revolution
Category:Gameplay