Erina and the City of Machines is a 2D RPG Maker adventure by coolsister, drawn in 2D with CG scenes. Originally a Japanese title, it is available in an English fan translation. You play Erina, an engineer and self-described adventurer who reaches Era Sheila after moving from place to place while taking requests and chasing a romantic idea of adventuring. Era Sheila honors a famous adventurer Erina admires, and it is also called the City of Machines. The city is filled with sexually interested men. The game is a fantasy adventure with adult BDSM content.
The current build is v1.21, released December 27, 2024. It is not a Final version, so the project is ongoing rather than finished or demo. It runs on Windows and is censored, though a fan decensor patch is available. The update mainly repairs recollection and CG display issues introduced in v1.20, including problems in one v1.20 scene. It also adds unused Sleeping Elina content to the recollection, adds a curtain clothing-change scene, and gives some scenes a new View CG option with a recollection-specific display difference.
Developer's description
Erina, an engineer and a self-proclaimed adventurer,
finds herself in Era Sheila after wandering from place to place fulfilling requests in pursuance of the romantic adventuring dream.
The city is named after a famous adventurer, who happens to be one of Erina's aspirations as an adventurer herself.
Little did she know, the city had another moniker, widely known as the City of Machines.
Just what does this city, one full of sex-starved men, have in store for Erina?
v1.21
- Fixed a bug that CG was not displayed correctly in some “Display CG” items implemented in recollection in ver1.20.
- Fixed a bug that some CG displayed during the event of “Semen Removal” scene added in ver1.20 were not processed transparently. Fixed a bug that CG was not displayed correctly in the event of the scene “Semen Removal” added in ver1.20.
- Fixed other minor bugs in the items added in ver1.20.
- Added the unused portion of “Sleeping Elina” displayed in the status screen to the recollection (added to ver1.20 area).
- Added “Changing clothes through the curtain” to the recollection (added to ver1.20 area).
- Added a new feature to “Show CG” for some scenes. In the item “View CG” of a scene, a difference only for recollection was added (along with this, the display method when viewing some CG was changed)
Caro and the production (ver1.10)
With Roche and others at the stuffing place (coal dressing plant)
Morning at the stuffing place (ver1.20)
VIP and 1B (ver1.20)
v1.20
- Added a new event at the mining guild and shower room
In this event, the vagina In this event, a function to reset the accumulated value of the vaginal gauge to 0 was added.
・Added a scene that was not registered in the recollection.
・Added “Show CG” to scenes registered in the recollection that did not have a “Show CG” item.
・Added unused CG that was posted in the past on Ci-en and other added CG to be viewed in the game. Added to the reminiscence room
・Fixed a bug that CG was not displayed correctly in the reminiscence scene “Claire and Gurus”
・Fixed a bug that the costume change could not be executed after clearing “Owner's Last Request”
・Fixed other minor bugs
*All items added or fixed in the reminiscence room are now available at
Each character's The icon of each character is marked “v1.20” on the icons of
. (With some exceptions, the icon of the after-episode is not marked this way.
v1.10
CG of the H status screen, a battle standing picture, and an animation at the time of battle breakage are added to the reminiscence scene.
The standing picture used at the time of conversation etc. is corrected.
Fixed a bug in which the virgin status was not judged during certain events.
New H scenes have been added.
New scenes require that the game has been cleared or that existing events have been progressed.
Details can be found in the recollection room after clearing the game.
v1.07
Dec/07/2023
Bug fixesContent added
Added naked differences to some flashback scenes, fixed other bugs, etc.
Nov/27/2023
Bug fixesContent added
Added differences to the swimsuit photo event.
Other minor bug fixes.
Nov/18/2023
Correction of typographical errorsBug fixesMiscellaneous
Nov/13/2023
Bug fixes
After clearing the game, you can adjust your lewd level.
Other bugs have been fixed.
Nov/09/2023
Bug fixes
Resolved the issue where the fixes in ver1.02 were not applied.
You can now initialize the H status when circling.
Player reviews
Player rating4.0 / 5 · 20 ratings
Written reviews20 · avg 3.8★
Positive (4–5★)65%
Latest review2026-04-09
What players say
Mostly positive for art and erotic content, but story, corruption, and combat draw criticism.
5★6
4★7
3★4
2★3
1★0
Players like
Cute protagonist and appealing character art
Good H scenes and clothing options
Strong pixel art, UI, and steampunk setting
Low-grind, relaxing RPG Maker battles
Common complaints
Weak, linear story with poor final boss buildup
Corruption feels rushed and poorly developed
Combat is too easy and unrewarding
Best for players who enjoy pretty steampunk RPG Maker erotic games with light gameplay.
Summarised from 20 written player reviews.
Pinkaccuracy2026-04-09★★★★★
( Version used. 1.21.01 . Somehow earlier versions would not run on my machine ) Cute protagonist. Very cool story. Nothing stellar, but enough to be interesting and presented well. Good H poses. Nice map. Kinda hard to say where…
Akina_Plays2026-02-03★★★★★
Is just a Quick game to fap on, aaannnddd I spent 4 hour in it already good game thou pregnancy mechanic is still be unlocked later on. Gameplay wise is just your typical RPG maker game the have preggo but…
Rebelllion2025-11-17★★★★★
Erina and the City of Machines [v1.21] A really well-made RPG Maker game, very pleasant music, a cute main character, and most importantly, minimal use of basic RPG Maker assets The battles aren't intense, which is great, because you can…
★★★★★(20)
