Esterium Project

by Kosmos Games

Uncensored Windows Linux Mac
Versionv0.005
EngineRen'Py
Released2026-04-05
Updated2026-06-23
LanguageEnglish, Russian

About Esterium Project

Esterium Project is a 3DCG monster-girl RPG made by Kosmos Games in Ren'Py. You create a protagonist by choosing a class and backstory, with a few options now and more planned. It uses exploration, dialogue, inventory, trading, crafting, and a detailed quest log. Leveling and combat are still in prototype, though you can fight and kill a skeleton. A few explicit scenes appear, and the design avoids long sprawling text while keeping story and character depth.

The current v0.005 build was released on April 5, 2026 for Windows, Linux, and Mac in English and Russian, with no censorship. Development continues. It adds the first dungeon, with nineteen locations and several outcomes, one regular enemy, two bosses, one NPC whose fate depends on choices, and a collectible armor set crafted at the blacksmith. Also new: two weapons, a lightning rune, loot and selling items, notes and books, the returning male protagonist, new hairstyles, dialogue history, better interface tooltips, and improved intimate scene images for Taira and Shii’da. Combat now uses 2d10 instead of 1d20, criticals can occur when the roll beats Armor Class by five, and not every battle ends in death.

Developer's description

You can choose the protagonist's class and backstory. There aren't many options yet, but more is to come. Currently, the game features an inventory and trading system, crafting, a detailed quest log, dialogue, and location exploration. The leveling and combat systems are still in the prototype stage, but you can already kill a skeleton. There are also a few explicit scenes. Unlike traditional text-based RPGs, I want to move away from the concept of long, sprawling text. At the same time, I'll try not to lose the depth of the story and characters.​

Download Esterium Project v0.005

Changelog

v0.005 A new (or rather, the first) dungeon with 19 locations. Completing this area has several variations and possible outcomes. 1 new regular enemy + 2 bosses 1 new NPC. Her fate depends on you 1 new armor that must be collected piece by piece and crafted at the blacksmith. 2 new weapons + 1 new lightning rune New items for looting, selling, and future crafting. Notes and books system. The male protagonist has returned. 1 new hairstyle for each gender. Added the ability to view dialogue history. Updated interface with more detailed descriptions and tooltips. Improved images of Taira and Shii’da in intimate scenes. Combat: The base dice roll has been changed. 1d20 is now 2d10. A critical success occurs if the roll exceeds the Armor Class by 5. Not all battles now end in death (a special note will be displayed on the battle screen). Sometimes, a defeat advances the story. However, you will not receive experience for enemies killed by someone else. Turn order display. 2 new combat effects: blind (provides disadvantage to attacks) and entangle (removes 1 action point). 2 new combat items: anti-bleed bandage and antidote. Ability to craft poison and apply it to weapons. A pickaxe can now be used as a weapon. Ability to catch an enemy off guard. Ability to switch weapons during combat. Several combat bugs have been fixed. [/ v0.004 Progression system You will now gain experience for killing enemies and completing quests. As you level up, you can improve skills and attributes. Currently, you can level up to level 3. Each level also increases your maximum HP. The male protagonist option has been removed. A schematic world map has been added. World concept changed: characters no longer resurrect infinitely. The ability to use magic has been added The key attribute is Intelligence. You will need to use special runes. One of them can be found in the game world. Campfires and sleeping Campfires can be lit if you have kindling materials. You can sleep near a lit campfire. To sleep, you need to have some food in your backpack. Sleeping restores HP and action points. Sleeping refreshes some of the loot in locations. Sleeping skips time by 1 day. Many UI changes. Most NPCs are now displayed on locations. A new enemy type with new abilities. Several new locations. New goods. 2 new female NPCs. One new face option for the main character. A new menu with all character data has been added. This is also where stat progression will take place. A new ring for the character that reduces bleeding duration. New loot items. Armor slot changes. Hotkeys have been added to open the main menu sections. The English version has been redone from scratch. Fixed places where Russian words appeared. One new quest from Ash. You can find money in containers. You can also take everything at once. Updated main menu background Tech Demo - v0.0003 Character Creation: 4 body types, including 2 male, 2 female, and 2 futanari. 3 face types for each body type. 2 hairstyles for each body type, 3 hair colors. You will always be able to see your character, including all of the above features. Enter your character's name. The character will also display the equipped armor. In addition to the starting loincloth, you can buy leather armor from the blacksmith. 12 different origins that affect starting characteristics and some unique dialogue options. Updated Interface: New background Pop-up windows with detailed information. Equipment rework. Gloves and pants are now part of the armor set. All icons have been redrawn. Combat System: Action point system. You have a total of 3 points. Attacking costs 2 points, and you can spend one point to drink a healing potion. Special attacks and special status effects system. Currently, there is one weapon capable of inflicting bleeding.

Player reviews

Player rating 3.5 / 5 · 4 ratings
Written reviews 4 · avg 3.3★
Positive (4–5★) 50%
Latest review 2026-04-03

What players say

Mixed reviews: promising RPG potential in Ren'Py, but luck-based combat and early bugs limit enjoyment.

5★ 2
4★ 0
3★ 0
2★ 1
1★ 1

Players like

  • Unique RPG mechanics blended with Ren'Py
  • Promising early RPG foundation with potential
  • Crafting and fantasy wasteland setting

Common complaints

  • Combat relies too heavily on luck
  • Untranslated text and early bugs
  • Limited choices and linear gameplay

Best for players who enjoy promising early RPG experiments with crafting and fantasy settings.

Summarised from 4 written player reviews.

Red246 2026-04-03 ★★★★★
RNG fights with no saves during them, untranslated text, and very linear gameplay. It looks interesting and could be expanded but the review is for now and not future, so good luck maybe i will update this after more content…
BlackMamba21 2026-03-28 ★★★★★
middling character creation, the claim of "playing the game how you build" is a fat lie considering the whole battle system relies on pure dumb luck. If combat is going to be so over reliant on luck, then why even…
Xan_Vados 2025-11-05 ★★★★★
Quite short, but a very good game with lots of potential. The blending of RPG mechanics and Ren’Py is quite unique, and I don’t think I’ve seen much like it. Although there are some HTML-based games, I think this one…

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