Isekai Bastard is a Unity-made adult adventure game by Bastard-Sama. You play a withdrawn, porn-obsessed man who feels worthless after being mocked by others. After clicking an odd advertisement for the MMORPG Necronomica, he is pulled into that gothic fantasy world, where cruel settings and monster girls await. Learning he can carry in-game abilities back to ordinary life, he aims to become a villain in both places while gathering monster-girl allies. The game is presented in 3D CG, with animated scenes, and it warns that some heroines appear in sharing-related content.
Current build is v0.14, released January 14, 2026, and development remains ongoing. It runs on Windows, Linux, and Mac in English, with censorship. The latest changelog marks the Chapter 1 finale: it adds a two-part continuation of the main story, introduces other players, the Architect, battles, lore, and eleven additional characters. It also completes the bordello construction, adds new heroines and scenes before Chapter 2’s management system, and gives Shesevelle a bonus tavern scene after Chapter 1. Laura gains new bathtub, tea, and beach events, while Jessica receives updated shower scenes, an added bath scene, and a major bowling event.
Developer's description
Take on the role of an Ugly Bastard. A reclusive, antisocial, porn addict who spends every day locked in his room. With no friends, no future, and no purpose, he is treated like a loser by everyone around him. One day, while surfing the internet, he clicks on a strange ad about a new
MMORPG
on the screen. When he tries to create his character, he is "sucked" into the game called "
Necronomica
". A gothic fantasy world that is ruthless and cruel, but full of monster WAIFUS. When he discovers that he can return to the real world with all of his character's powers, He makes a decision: to become a true villain in both worlds and have an army of hot monster girls by his side.
(This game contains NTS (sharing) content with SOME heroines. Please be warned before playing)
v0.14 Chapter 1 Finale
New Scenes and Events
Necronomica and Main Story Scenes include:
Continuation of the Necronomica story in two parts
Introduction of the other players, the Architect, battles and lore featuring 11 additional characters️
Finalization of the bordello construction
New heroines and sex scenes before the bordello management system for Chapter 2
New bonus sex scene for
Shesevelle
at the tavern after completing Chapter 1
Laura's New Scenes
New scenes in the Bathtub Event
Threesome event (Laura/Jessica)
Tea event at Grace's house now has 4 spicy scenes: (MC/Laura) (Tucker/Grace)
Several scenes in the
Beach Event ️
Jessica’s New Scenes
Updated shower scenes with fixed requirements and added one more sex scene with Jessica in the bath
Major
Bowling Event
for any day in the
Classroom
when it's not raining, and a Threesome with Hanna
Several scenes and
Pregnancy Flag
for Jessica in the
Bonus Beach Event
️
Added Incubus scene to the event:
Sleep Event
Scene with
Serena
Helena’s New Scenes
More scenes added to the event:
Saturday Morning Visits
Several new scenes for the
Getting Dressed
event in her room
The Laptop event was updated with new scenes and an event where Helena lets the MC sleep in her bed
Several scenes in the
Beach Event ️
and in the
Alone at home Event ️
Sex scene and romance with
Serena
(NTS/FUTA)
Technical Upgrades ️
Fixed: Fixed a bug where thumbnails for all save slots were being deleted.
Fixed: Laptop event was adjusted to allow progression without NTS requirements if
Helena
has high flags. ️
Fixed: Automatic Sunday morning event was changed to allow resetting Serena's FUTA Flags.
Fixed: Increased maximum input length from 10 to 14 characters when naming relationships and the MC.
Fixed: Loading a save while a long SFX audio is playing no longer bugs the audio in the newly loaded save.
v0.1.3b - Public Release (May/25/2025):
Necronomica
and Main Story Scenes:
Implemented the
Incubus Form
for the player character, featuring a new spell and a scene in this form.
1
romantic scene
1
sex scene and a short cinematic event
Laura's New Scenes
1 major
Romantic Date
with
4 spicy scenes
in the "
Breakfast With Helena"
event
2 scenes in the “
Oversleeping
” event (Requires
Laura’s Corruption ++
)
2 scenes in the “
Reading in Bed
” event (Requires
Romantic Date
)
1 scene in the “
Late Night Massage
” event (Requires
Romantic Date
)
1 NTS scene with James in the “
Late Night Massage
” event (Requires
Romantic Date
and “
Sharing
” enabled)
1 bath scene, a work-in-progress system for future bathroom sex scenes (Requires
Romantic Date
)
Unlocked a new corruption level: "
Girlfriend
" for Laura
Jessica’s New Scenes
2 major scenes in the “
Dinner
” event (Requires
Jessica’s Corruption ++
)
3 minor scenes.
Unlocked a new corruption level: "
Cum Addict
" for Jessica
Helena’s New Scenes
1 bonus scene for the “
Panty Fun
” event (click on the dresser in the afternoon)
1 bonus scene for the “
Late for Work
” event (Requires
Jessica’s Corruption ++
)
1 bonus
NTS
scene with Tucker for the “
Late for Work
” event (Requires “
Tucker Sharing
” enabled)
Technical Upgrades ️
Fixed: Rare bug in the save system where deleting saves could brick the save slot
Fixed: Bug where some animations had slightly increased speed depending on the user’s FPS ️
Fixed: Bug in the tracker that showed
Helena
in places where she wasn't ⚠
Fixed: Some scenes now connect better and have their BGM audio fixed
Fixed: Typos and minor bugs
Heads-Up: Save Smart to Avoid Issues!
To steer clear of problems, make sure to save at the player’s bed in previous versions, then load that save in the new version.
v0.1.2b - Public Release (Mar/04/2025):
Some bugfixes and tweaks to the girl's relationship points. '
Run in Background
' mode can be changed in
settings.ini
.
Windowed mode adjustments
v0.1.2:
Shesevelle is the star of this update! Many scenes feature her, including:
2 romantic scenes
1 regular event in the dungeon
2 major spicy events with multiple animated scenes (FUTA)
1 major sex scene (Non-FUTA). (If you choose not to view FUTA content, you’ll miss 50% of her sex scenes, but I promise to create more non-FUTA scenes for her in the future!)
Meet Echidna
A new character joins the MC's party!
1 romantic scene
2 sex scenes
Natasha’s New Scenes
A NETORASE event featuring Guh'trak (Scene commissioned by subscriber vote!)
You can now review her 'jug' scenes
Jessica’s New Scenes
Corruption++ Unlocked!
1 major event with 3 spicy scenes during automatic Sunday morning visits
A Corruption++ scene added to the "Getting Dressed" event
Helena’s New Scenes
1 major event on her bedroom dresser (click on the dresser in the afternoon)
1 major event in her room featuring 3 spicy scenes and a big NTS scene with Tucker
1 new event at the vanity with 2 small scenes and a framework for future events
1 major event with several scenes during her new automatic Saturday morning visits
Technical Upgrades ️
Fixed:
Windowed Mode
is now working and resizes the game to
1664x936
.
Skip-Speed
+40%
. I can't increase it more than that due to bugs.
Changed the way that audio files were loaded into memory to try to mitigate the excessive memory usage when loading the game for some users.
Reduced the grind by making events like "
Dinner
" give one point with all girls and the event "
Food Contamination
" give +2 instead of +1 points.
Some events require fewer points and events like working out at the gym give points now. No more weekly point loss.
Added: Skip Prologue function ⏩
Added: End-of-content warnings on several scenes ⚠
Added: Skip menus for long scenes ️
Integrated: Online Walkthrough via a button on the MC’s phone
Fixed: Save/load thumbnail glitches, wrong image loads during animations, and pesky UI bugs
Added: A handy Save/Load toggle button
Removed: Save/load text overlay and bathroom Jerk-off scenes (They’re being reworked for a future update)
v0.1.1d (Jan/18/2025)- Major Bugfix:
Fixed Game-breaking bug in maximum allowed relationships. Now relationship points should work correctly.
Added multiple save slots
Added
Settings
in main menu
Added QUICKEVENT function for several scenes.
Quickskip (left CTRL) is 200% faster.
Fixed Save menu screen that was allowed in places where it shouldn't
Added detailed information in Relationship Panel for the girls
No more relationship decay
Added Improved relationship messages
Function to allow
Skip Prologue
Added option to shorten the office event with Helena
Shortened logo and warning time
Fixed Typos and minor visual bugs
v0.1.1c (Jan/15/2025):
Fixed Jessica Night Event
Fixed Linux Cursor Bug
Texts are now instant and with no transition pauses.
Easier to get relationship progress with all girls.
Fixed bugs and freezes in sandbox events
Added
quickskip
function
Reduced transition times
Fixed Late night events.
v0.1.1:
Grammar/Text fixes
Fixed a bug on the
SAVE/LOAD
interface
Improved the navigation system between separate places
Added an animated overlay system on background images that greatly improved the menus and loading screen
Implemented the ability to advance dialogue with the mouse instead of just the space bar
Implemented the smartphone contact system WIP
Fixed some typos and remade some very old renders.
v0.1.0 - Initial Release:
2640+ New Images
121 Animations
19150+ Lines of Code
165 Music and Ambient Tracks
170+ Sound Effects
Updated Dialogue Interface
Player reviews
Player rating4.0 / 5 · 20 ratings
Written reviews20 · avg 3.5★
Positive (4–5★)55%
Latest review2026-04-04
What players say
Mostly positive but divisive, praised for models and story despite grind, protagonist, and NTR.
5★9
4★2
3★2
2★4
1★3
Players like
High-quality, realistic character models and renders
Interesting premise and corruption/harem story
Large amount of content for one year
Common complaints
Slow, repetitive grind with poor skipping
Ugly male protagonist and poor male models
NTR and sharing undermine villain power fantasy
Best for players who enjoy realistic models, corruption harem stories, and patient grinding.
Summarised from 20 written player reviews.
bvb1572026-04-04★★★★★
Downsides: Too grindy Many unnecessary scenes that aren’t skippable Upsides: Top-notch renders Realistic characters (with cellulite and love handles) A huge amount of content for just one year of development It’s far from perfect, but it’s a very good game…
Niels Holgersson2026-01-23★★★★★
I'll come straight to the point 1. The idea of the game is absolutely great, ugly little duckling becomes the vulture, he's great. 2. Implementation is awful, too complicated, you drag through scenes for hours, a walkthrough that isn't worthy…
Critical Darling2026-01-22★★★★★
The premise of becoming a powerful Evil Lord in an isekai world is great, but the "NTS" mechanics completely ruined the experience for me. It’s hard to feel like a dominant, all-powerful villain when the game forces cuckold-style situations on…