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Tentacle Realm Escape [v0.2.1] [Shimomura Tsutomu]
Hey everyone!
This is my very first game ever – like, my baby, my debut, my virgin release lol. I decided to drop it on itch.io as a pure gameplay slice, and yeah, it’s completely free, so please be gentle with me (´・ω・｀)
It’s basically a super rough, bootleg version of Dead by Daylight… but with some XCOM flavor thrown in. The core rules are dead simple: You control 4 survivors, repair/fix all the objectives, and then haul ass to the exit gate.
The big twist (unlike DbD) is that you actually have some serious firepower. You can straight-up delete any boss that’s pissing you off… but every time you kill one, it comes back.
Thread Updated: 2026-06-24
Release Date: 2026-05-25
Developer: Shimomura Tsutomu itch.io
Censored: No
Version: 0.2.1
OS: Windows
Language: English
Store: itch.io
Other Games: link
Genre:
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Adult, Chess, Eroge, Fantasy, Hentai, NSFW, Strategy, Tentacles, Turn-Based Combat, Turn-based Strategy
Installation:
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1. Extract and run.
Changelog:
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v0.2.1
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Sorry for the 1-2 week delay due to work…
And I plan to finish the main framework before Musk’s Starship 13th test flight!
Let’s see what’s new this time!
First, our game finally has its own mascot! Just like Paimon from Genshin, Amiya from Arknights, or Pikachu from Pokémon~
Mowl — a cute hybrid of an owl and a mouse, a subspace creature that’s a close relative to humans, with the ability to break the fourth wall…
(Though it won’t appear in the story until much later
Also made some balance adjustments and optimizations for controls and information display~
This update adds 5 new characters (including 1 OC)! Three of them form an “Energy” system together. Plus one super powerful character that gives full-screen vision! (☆ω☆)
My big plan is to create 5 systems: Energy, Stealth, Assassination, Element, and Totem. Energy, Stealth, and Assassination are already in the game~ Elements and Totem are still in the idea stage
Next… a brand new mode! Tower Defense mode!
Players destroy a crystal to create a mana spring, harvest cost from it, and spend that cost to build defense towers. Enemies rush in from multiple paths toward the exit — you can block them with your own body or chill behind your towers~
The first TD map is only half done, so more coming soon!
Also planned for the future: a special receive-hit-retreat mode. These three modes will make up all the small battle elements!
Oh, and I added voice acting for 3 characters!
Future Plans:
- Complete the full tutorial
- Write character profiles and individual tutorials for each
- Update the story (I wrote a ton but ran out of time — next update for sure!)
- Polish sound effects and voice acting
- Add a save function
- More icons for skills and statuses
- UI art improvements
- More enemies (some OC friends are still waiting to join the party~)
- In-game world encyclopedia (lore documents)
- About the Discord group… I’m a bit socially anxious and have no idea what to say as the first message… please give me some time, I’m begging you!
Lastly, still recruiting OCs! This time I’m looking for fallen/evil god side female characters (to be bosses or elite monsters). In-game, players can defeat bosses to unlock these overpowered versions!
v0.1.999
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Hiii everyone. I finally finished the update before Musk launches Starship 12! Looks like my development speed is much higher than xSpace~ I originally wanted to rush it out before Artemis 2 though
The reason it took so long is because I got completely addicted to Civilization 6… but don’t worry! I already uninstalled it~ I’m a good kid now
This version is called 0.1.9999 because there are definitely going to be a bunch of bugs. Once everything is properly debugged, it will officially become 0.2!
What’s new this time:
- Fixed the late-game issue where enemies would just stand at the door and stop attacking.
- Added the most basic tutorial system, including trigger tutorials. I think the trigger tutorials will become a major bug breeding ground… really wanted to make cute animations like those mobile gacha games, but my technical power is limited… so… sorry~
- To prepare for the future roguelike mode: When playing Level 1, you can now choose the map and enemies! In the future there will be many more modes like Encounter Battle, Tower Defense, Escape Battle, etc. Once full roguelike is implemented, players will randomly encounter different enemies, maps, and rules~
- Added Story 2 (To be continued~) — Our male protagonist finally makes his appearance!
- Gallery is now open! Added H-Scene 1
- Added the Clash system (heavily inspired by Limbus Company’s clash mechanics~)
- Added battle voice lines! (Currently only Bonnie has them)
- Added token thumbnails so you can easily see who’s doing what during battle
- Added new enemy artworks, including a tentacle Iron Maiden! She’s super slow but has extremely high attack and defense. She doesn’t have the General’s teleport, so mobility will be very important against her~
- Added a new OC: a fox-girl Onmyoji who can grant Stealth to units. Stealth is an infinite-duration buff, but if you charge into the enemy lines too recklessly, there’s a chance the buff will disappear
- More content will be placed inside the in-game tutorial~ I’ll slowly add everything there so it doesn’t feel too overwhelming at the beginning
OC Recruitment Still Open! We’re mainly looking for enemy OCs right now! (The girls already have quite a lot… I’m planning for a total of 32 female characters in the end~) So if you have any cool, wicked, or super strong enemy ideas, please send them my way! I’ll be very grateful
About the future Roguelike mode I’m still collecting everyone’s opinions~ Do you prefer:- Arknights Integrated Strategies style (combat-focused + random events)
- Uma Musume style (management + training + raising characters)
- Please tell me which one you want more! Your voice matters a lot
World Setting & Background Our game finally has an official series name — Oscines ( Japanese: 鸣鸟特攻 / Oscines Special Attack )
In Latin, “Oscines” refers to the ancient Roman practice of bird divination — the singing birds that bring messages from the gods. In our game, Oscines is the codename of a secret plan: A project where weak, ordinary mortals gather their true courage and launch an attack against supreme evil gods.
All the games we make will belong to the Oscines universe~
Our Protagonist Nation Eumines Federal Republic - A mighty interstellar civilization with the core values of nation, freedom, and glory. They control: • One full continent on their home planet • One entire colonized alien planet • Dozens of treaty colonies (islands or continents taken from other worlds) • Nearly a hundred Mars-like and Moon-like celestial bodies • Over 400 space warships • 20 full legions with more than ten million ground troops
This is the foundation of their Pax Eumines.
“Eumines is here. Eumines is there. Eumines is everywhere.” Between the stars, whether good or bad things happen, you’ll always see the shadow of Eumines. They are the Earth of Star Trek and the Imperium of Man of Warhammer 40K.
However… Our story begins with Eumines suffering a huge setback right at their own doorstep…
v0.1.3
In this update we added two brand new OC characters!
- Kaya — a super agile catgirl dancer! She’s all about movement: blink herself, blink allies, blink enemies… just like Sun Tzu said: “Attack him where he is unprepared, appear where you are not expected”
- Nerena — a shy little dragon girl with almost no friends… but she has a 3-meter-tall golem bodyguard! You can summon him to follow you, smash anyone who bullies Nerena, and yes… you can even make him self-destruct for her. Making the summon system actually work took me FOREVER, my brain almost exploded… but it’s done!!
Also!! This is the first time we added a Story Mode! Right now it’s still very simple (just the opening radio broadcast), but we already know that something BIG happened on Nolava Island (roughly the size of Australia). The island is now completely sealed off… and things are getting… weird.
We also updated some sound effects!
- The super important walking footsteps are finally in!
- And… those “unspeakable” sex sounds you know what I mean. More audio will keep coming in future updates~
v0.1.2
1. Music Glow-Up! ♪
1. Music Glow-Up! ♪
1 dreamy menu BGM to vibe with
4 battle tracks that change depending on how the fight is going: → when you’re dominating (advantage mode~) → when it’s even (neutral tension) → when things are getting tough (disadvantage panic music hehe)
2. 8-Person Party Complete! ✧ We finally have a full 8-member squad! Now you can do real 4/4 tag-team switches mid-battle, just like the classics~ Click the Unit icon (top-left corner) anytime to see your bench and swap whoever you want!
3. Team Skills (Work in Progress Edition) ☆ Reserve units now give Team Skills to support the ones fighting on the field! Right now only two characters have actual skills implemented — the rest are cute little placeholders while we finish designing the whole system
v0.1.1
Player Controls & Quality of Life Improvements:
– All characters now have waypoint movement! No more clicking tile by tile like before~
– When one unit runs out of AP, the game automatically switches to the next movable character. Smooth as butter now!
New Mechanic: Assassination
If a unit has at least two enemies in their vision that only they can see, they enter “assassinatable” state.
Weapons with the Assassination tag have a chance to one-shot them.
Assassination works on both sides, but right now only our units have the skills for it~
Bosses have some resistance… but if you’re lucky, you can still instantly delete half their HP—no matter how tanky they are!
New Mechanic: Queen’s Blade
Victory condition changed: Just get the unit carrying the Queen’s Blade to the exit and you win!
Defeat condition: If the unit carrying the Queen’s Blade falls (gets corrupted), it’s game over.
This means the match can flip in an instant—total chaos and hype!
Balance Changes:
– Fallen state now requires more stacks, which means… you get to enjoy the spicy CGs for way longer~
– QTE difficulty has been greatly reduced—perfect for one-handed play. You’re welcome.
Brand New Characters (3 of them!):
– Violetta: Mistress of the shadows and the main user of the new Assassination mechanic. She thrives in the dark~
– Moyu: Eastern dragon girl straight out of Arknights vibes. She buffs allies and refreshes weapon/item uses. Super useful!
– Bonnie: Cowgirl adventurer who crossed into the kingdom. Gets random buffs and deals super unpredictable damage—pure chaos in the best way.
Team Building System:
You can now adjust your lineup order! The first 4 of your 8-unit roster will deploy.
A total of 32 survivors will eventually be added, so get ready for some serious deck-building fun. Stay tuned~!
v0.1
initial zone release
Developer Notes:
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stronger. Like, way stronger. Good luck lol (￣▽￣;)
Here’s what’s done so far:
– Single-level game loop → ✓
– Full story → ✗
– Music & sound effects → ✗
– Character progression/system → ✗
– Extra player characters → ✗
– More bosses → ✗
– Tutorial → ✗
– Art/assets → ✗
**Quick story background:**
In a dark fantasy world, an underground kingdom called Migram has been taken over by a tentacle eldritch god. These things slaughter the men and treat the women like literal breeding stock, so obviously the people said “hell no” and started fighting back.
But the tentacle demons gave their minions straight-up immortality. You can only kill them for good by destroying their hearts… and those hearts are shielded inside barrier crystals. So yeah – your job is to smash four of those crystals, break into the vault, bust through the final gate, and take down the big bad oppressor once and for all.
**Quick note about the English & Japanese translations:**
The game has both English and Japanese support, but here’s the tea: my native language is this super obscure tiny one, and I speak literally zero English or Japanese. So… yep, 100% of the English and Japanese text in the game was done by AI (￣ー￣)
Anyway, if you try it out, thank you so much! Be nice, it’s my first time (´；ω；｀)♡
