''Operator's Side'', also known as ''Lifeline'', was a PlayStation2 game by Creator/{{Konami}} that attempted a new spin on the SurvivalHorror genre by making the player MissionControl. Set in the year 2029, it casts the player as a young man visiting a newly opened, state-of-the-art hotel inside an orbiting SpaceStation. After monsters crash the party, the player awakens inside the station's main control center, with no clue as to how he arrived there or where his girlfriend is.

However, using the ship's various cameras, he locates a survivor -- a cocktail waitress named Rio -- and contacts her via her headset. From there, the player must guide Rio through the monster-infested station, gradually unraveling the truth behind the incident.

Instead of controlling Rio directly via a gamepad, the user gives her commands over a USB headset, with scripted voice commands such as 'shoot [the] [[ForMassiveDamage head (or other weak point)]], 'dodge left/right/back', 'turn left/right', 'stop', 'run' and so on. The player can also direct Rio during cutscenes, make small talk, and even restore her health by playing tongue twisters with her.

Unfortunately, the voice recognition system wasn't very well polished; Rio frequently misunderstood commands or acted inaccurately, and the player had to speak very calmly and clearly to be understood. Conversations were limited to simple nouns and verbs, [[YouCantGetYeFlask which became very frustrating]] during the game's many puzzles.

!!Provides examples of:

* AndYourRewardIsClothes: Tying into [[{{Fanservice}} Rio's real role]].
* ButThouMust: When you meet her, Rio asks you to remind her what your girlfriend's name is (Naomi); however, you're more than welcome to suggest other possibilities -- the game actually recognizes several different names, which Rio then echoes -- but she will just keep prompting you with more and more blunt pointers towards the right name until you get it right.
* CatScare: Done several times, most notably with a [[spoiler:music box]].
* CollectionSidequest: The sixteen chips.
** Also various commands that can be found and then issued that don't have much value in advancing the game, such as "Sexy Pose".
* TheDevTeamThinksOfEverything: Surprisingly, quite a few commands/questions avoid [[NoFourthWall breaking the fourth wall.]] The first such example is asking Rio how to open the door to the room she's stuck in, which she will give (completely useless to the player) instructions on how to activate the door.
* EasterEgg: Very early on, when Rio forgets the name of your girlfriend, if you answer with the name of Rio's voice actress instead of "Naomi", she'll remark about how that name sounds familiar, but isn't the name of the girlfriend. Likewise, if you answer with Rio's own name, she wonders how you could possibly know it.
** Series/XPlay once found a rather interesting one-Adam, playing the game for the review and frustrated at Rio's particular brand of uncooperativeness, mutters "bark like a dog" into the microphone, and Rio responds, "Little dog, wuff wuff, or big dog, roof roof?" After the segment they actually went to the trouble to explain that no, they hadn't included it as a joke (which they were occasionally wont to do); it was actually part of the game.
* GameBreakingBug: One early puzzle involves reciting a three-part password: the player recites one part, Rio another, then both must recite the full phrase in unison. Unfortunately, the ''timing'' of this last part is frustratingly difficult to get down, and made ''worse'' by how the game ''doesn't recognize that the player is speaking if Rio is talking''. Meaning the player has to, basically, ''trick'' the game into thinking you spoke in perfect unison, ''while'' actually reciting the phrase so that it can be "heard"...
* MissionControl
* MolotovCocktail: Manages to turn into a plot point, when the player has to help Rio create one to destroy an alien blocking a hallway.
* MsFanservice: Rio.
* NewGamePlus
* NonstandardGameOver: When Rio very politely asks you to help her, [[WhatAnIdiot saying no]] [[RuleOfThree 3 times]] will result in Rio shooting the camera, walking out of the room, and dying off-screen.
* [[spoiler:PhilosophersStone: Invented by Rio's father, and currently inside of Rio herself as a replacement for her heart. Imperfect copies of the Stone are responsible for transforming the humans aboard the hotel into alien monstrosities.]]
* PuzzleBoss: One early boss involves watching a near-invincible monster's movement pattern and having Rio throw a homemade Molotov Cocktail at ''just'' the right moment. Get the timing wrong, or wait too long, and [[NonstandardGameOver what follows]] [[TheManyDeathsOfYou isn't pleasant]]. [[note]]The time limit factor is particularly annoying, given that she lights it ''before'' a fairly long cutscene where she reviews your plan yet ''again''.[[/note]]
* TheScream: [[spoiler:As Rio takes her machine gun to several canisters of copied Philosopher's stones.]]
** ShoutingShooter
* ThirdPersonSeductress: Rio.
* VoiceWithAnInternetConnection: [[InvertedTrope Inverted]] - you're the one talking here.
* WhatTheHellPlayer: Rio gets pissed off if you swear at her. [[GuessTheVerb And you will.]]
* YouCantGetYeFlask: Made interesting by the game's verbal input system.

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