Esterium Project [v0.004] [Kosmos Games]

March 27, 2026F95

You can choose the protagonist’s gender, 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.

Thread Updated: 2026-03-27

Release Date: 2026-03-06

Developer: Kosmos Games Patreon – Subscribestar – Discord – Steam – Instagram – Itch.io

Censored: No

Version: 0.004

OS: Windows, Linux, Mac

Language: English, Russian

Other Games: Link

Genre:

3DCG, Big tits, Character creation, Female protagonist, Futa/trans protagonist, Male protagonist, Monster, Monster girl, Rpg, Sandbox,

Installation:

1. Extract and run.

Changelog:

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.

Others:

2 new weapons. One you can craft, and the other you can take from an enemy.
Several new locations and 1 new female character.
Tyra’s appearance has been changed, as has the scene with her.
Improved trading system. The selling and buying prices now differ. The markup amount will depend on the NPC’s attitude.
You can learn something about the laws of this world from Cinder.
In the Russian version, the gender of the main character is taken into account in the dialogues.
Work is also underway to adjust the game’s lore.
In general, there are so many minor changes that I don’t see the point in wasting your time. It’s best to just try playing the game and share your opinion. At this early stage of development, your feedback is especially important.
Known issues: There are some localization errors. A few lines in the combat log may not be translated. If there are too many untranslated lines, change the language in the settings, restart the game, and start a new game. That should help. I hope to fix this problem in the near future.

Known issues: There are some localization errors. A few lines in the combat log may not be translated. If there are too many untranslated lines, change the language in the settings, restart the game, and start a new game. That should help. I hope to fix this problem in the near future.

Tech Demo – v0.0002

Tech Demo – v0.0001 – Initial Release

Basic character creation system
Simple resource gathering mechanics
Inventory management fundamentals
Equipment crafting system prototypes
Initial version of the combat system
Simple quest system
Interaction with one NPC

Developer Notes:

The Esterium Project Concept:

A text-based RPG set in a fantasy world with sandbox elements
Aiming for maximum player freedom — explore the world as your character’s strength allows
A world that will be filled with quests and activities
Combination of text-based storytelling and visual elements (character images and key scenes)
Lots of NSFW content

How This Project Differs from Bright Past: