system The System from the East: Project-Zetvl

[AddPlck 86]

This mysterious system from the East has finally lifted its veil.
Its name: Zetvl. Project title: Project-Zetvl.

Development began in mid-September 2024. Initially, it solved the integer limit issue in the base game, then progressively rolled out player experience optimizations. By early this year, updates unexpectedly paused...

Come mid-February, updates miraculously resumed. The creator shared his work within his mini-game community platform.

Over these four months, game re-optimization updates were systematically implemented. New features now make it a fundamentally distinct mod from the original.

Important: This mod remains in early development. Some features are work-in-progress or contain minor issues—please maintain reasonable expectations.

The mod's creator is the publisher of this thread.

Version 1.0.7.2 Release Notes

• The Definitive Edition of Age of Civilizations II is coming soon, and we plan to release this version ahead of its launch.
• Due to various reasons, we have to continuously refactor the national focus system, so it remains unfinished in this version. We ask for your understanding.
• Versions 1.0.7.0 and 1.0.7.1 contained many bugs, so we prioritized player experience. We also apologize for the long delay in this update.
• This version fixes numerous issues from previous releases and further optimizes certain aspects. For details, please refer to the changelog.
• Thank you for your support.

# Zetvl Mod Full Update Summary (Sept 2024 – Apr 12 2026)

• Upgraded civilization population, economic output, treasury, income and expense values to long integer to break the 2.1-billion limit, and adopted abbreviated large number display (18K, 36K, 1W, 3E) with comma digit separators. The engine was updated to LibGDX 1.13 and later reverted to 1.9.14 for stability. The game was successfully ported to Android on Feb 24 2025 with version 1.0.5.0 released, featuring crash window, Toast notifications, popup animations, background optimization and multi-resolution support.
• Integrated BE combat and surrender systems, enhanced tech suppression effect in wars, displayed surrender progress in war panel, and added dynamic surrender overlay above 80% progress. Only Heartland provinces count toward surrender calculation; territories are automatically distributed to top contributors upon capitulation, and capitulated civilizations cannot launch wars. Added nuclear weapon system with AI deployment capability, global nuclear events, and console commands for nuclear control. Fixed civilian casualties being counted as military losses and added detailed casualty source display.
• Introduced manpower, occupied manpower, government support rate, standard and strict supply systems; low happiness or over-expansion may reduce support and trigger revolutions. Added delayed recruitment, AI recruitment logic, and automation features including auto-build, auto-invest, auto-recruit, auto-attack and auto-assimilation. Added three province core types (Heartland/Occupied Territory/Colony), optimized occupation sovereignty rules, and vassal system with color synchronization and war/diplomacy restrictions.
• Greatly improved province auto-connection efficiency by 90%, supported province file packing, AoH3-to-AoH2 map migration, and JSON-formatted terrain data. Added demilitarized zone (DMZ) function configurable via scenario editor, events and decisions.
• Overhauled UI with TNO-inspired super event UI, HOI4-style loading screen, animated main/loading backgrounds, non-linear easing animations for menus and transitions. Improved map zoom with smooth name fading, dynamic city rendering, and vassal color sync. Supported custom borders, menu backgrounds, fonts, textures, color templates and music playback with playlist and auto-scanning for MP3/OGG files.
• National Focus system was moved into core, rebuilt, and enhanced with visible active focuses, completion popups, and improved editor supporting connection editing. Event system was upgraded with colored tooltips, multicolor text, audio linkage, search function, leader replacement, exit war effect and global event broadcasting. The event editor now supports music, super-event and global event data with saving issues fixed.
• Added observer mode, borderless window, real-time debug log panel, expanded console commands, and configurable flag position. Improved scenario editor with higher sliders, starting population setup and tech editor fixes. Optimized loading speed, memory leaks, rendering logic, in-game lag and various UI glitches. Unified file I/O to UTF-8 encoding, standardized configuration files, removed unused libraries and fixed save-loading, nuke construction and other known bugs.

For more update details, please check the in-game (About Menu)

 

The following is the updated content of the old version, for reference only.

After more than 1 month, we have released this update (1.0.7.0 FIX):

2025-06-09 to 2025-06-23 (Version 1.0.6.3)

• Added configuration file: Added  under the UI directory to manage new UI parameters and feature togglesMenuConfig.json

• Added interfaces: Enabled HOI4-style loading screen and TNO-style main menu interface via MenuConfig

• Dynamic Leader System: Civilization leaders now automatically change over time

• Numeric System Upgrade: Migrated civilization income/expense values from Integer to Long, exceeding the 2.1 billion limit

• Province Connection Optimization: Improved auto-connection efficiency by 90% (connecting 13,892 AoH3 tiles now takes only 30 seconds)

• Interaction Animation Enhancement: Implemented non-linear animations for menu transitions and province view jumps

• UI Adaptation Optimization: TNO super-event interface now fully supports multi-resolution adaptation

• Core Type System: Added three new province core types (Core Region/Occupied Territory/Colony), configurable via the editor

• Surrender Mechanism Update: Surrender progress now calculated based solely on core region province value

• Audio Resource Management: Added  folder for storing super-event and future audio resourcessfx

• Event Interface Optimization: Fine-tuned visual style of event UI

• Event Sound Effect Linkage: Placing  in  now links event images with audioexample.png.oggUI/events

• Nuclear Weapon System: Basic functionality implemented (AI deployment not yet supported)

• Font Color Configuration: Provided font color templates via ZetvlUniverse/interface/color.json

• Custom Texture Loading: Configure custom image resources via texture.json

• Dynamic City Rendering: Enabled province setting causes number of displayed cities to dynamically change with map scale

• About Interface Upgrade: Adopted new design style

• Background Rendering Optimization: Adjusted visuals for game loading screen and candidate backgrounds

• Main Interface Configuration: Added  configuration file (functionality to be extended)main_Example.json

• Text Display Optimization: Improved cropping logic for scrolling text

• Value Algorithm Adjustment: Optimized province victory point calculation rules

• Province Logic Update: Changed city tier assignment from population level to province value

• Game Startup Sound Effect: Added  as the new game startup soundsounds/Play.ogg

ZetvlX Version 1.0.7.0 Update (2025-07-06)

• Enhanced Surrender System: Dynamic light filter effect displayed when surrender progress exceeds 80%, intensifying with progress

• Automation Function Expansion: Added options for auto-building, auto-investing, and auto-recruitment

• Export Interface Upgrade: Integrated native file browser supporting path selection and file export

• X-System Function Integration: Implemented event search, leader replacement, and civilization name update features

• Nuclear Weapon System Upgrade: AI can now autonomously use nuclear weapons; nuclear status triggers record historical info and broadcast global events

• New Display Mode: Added support for borderless window mode

• Optional Combat Systems: Provided three combat modes: BE, VANILLA, and NEW_SYSTEM

• Configuration File Renamed:  →Zetvl_ModifyOption.txt Zetvl_Configuration.properties

• Added Nuclear Strike Tracking: When  is enabled, view automatically focuses on targeted province during a nuclear strikeGLOBAL_NUCLEAR_ATTACK

• Event Interface Revamp: Added  config option to enable the new event interaction interfaceNEW_EVENT_UI

• Scenario Info Optimization: Automatically count and display total events when saving a scenario

• Leader Lock Mechanism: Leaders changed via events are permanently locked and won't auto-change unless replaced by a subsequent event

• Surrender Mechanism Optimization: When a civilization ceases resistance, its territory is distributed to major civilizations based on damage contribution (only triggers once; resettable if surrender progress <20% and capital not captured)

• UI Fine-Tuning: Optimized in-game UI elements

• Core Occupation Rule: Direct sovereignty granted when occupying own core provinces; control transferred to allies when occupying their core provinces

• AI Peace Negotiation Logic: Peace talks can only be initiated when all Top 15 civilizations in the faction are at peace (testing phase)

• About Interface Upgrade: Integrated changelog and custom entries loaded via ZetvlUniverse/interface/Zetvl_EntryColumn.json

• New Console Commands:  (global declaration of war on a specific civilization),  (deploy reactors globally and distribute 100 nukes)survivalthermonuclear

• Global Event Trigger: Broadcasts global event when Top 25 civilizations cease hostilities after 1900

• Investment Mechanism Fix: Increased province development cap from 1.0 to 2.0 (vanilla fix)

• Bug Fix: Optimized happiness icon display in province info

• Command Adjustment:  now directly sets diplomatic pointsdiplomacy [value]

 

Credits:
Nuclear age from mega4oss - https://vk.com/mod4xstudio
Combat mechanics and surrender system from BE2 - https://vk.com/bloodyeurope2

Most of the rest of the code was written by me and a group of Chinese creators

Downloads:

• PC Manual Install (File-Overwrite):
  Google Drive
  ◆ Build:  | Requires Java 17+v1.0.7.2

• Android Version:
  (File-Overwrite): Google Drive
  Vanilla + Zetvl Engine: Google Drive

We're giving back another map, note that it's only available for the Zetvl engine

• Download: Google Drive

Screenshots: 

Edited April 12 by AddPlck
Cumulative one-month updates

[AOH3 FAN 1]

Modder name?

Where can I contact him?

[RostislavMerte 110]

this is peak

 

@bun_dha4 what do you think of this?

[Apple 171]

I'm happy some people still care about AoH2.

[Guest]

On 3/31/2025 at 6:55 PM, RostislavMerte said:

this is peak

 

@bun_dha4 what do you think of this?

fucking based, hopefully this leads me to replace 2.5 or uwut if done well

[Apple 171]

On 4/4/2025 at 9:01 PM, bun_dha4 said:

fucking based, hopefully this leads me to replace 2.5 or uwut if done well

AOC2 FOREVERRRR

[AddPlck 86]

Animation examples:

Note: This feature was completed in September 2024.

Edited April 11, 2025 by AddPlck

[Apple 171]

1 hour ago, AddPlck said:

Animation examples:

Note: This feature was completed in September 2024.

AoC2 will never diiiiieeee

[uwut 174]

peak aoh2 modding

4 hours ago, Apple said:

AoC2 will never diiiiieeee

i agree, aoh2 is a way better game then aoh3, we should keep it alive

[YouravaragebrazilianAoCfan 292]

AoH2 will never die, AoH3 isn't a true AoH game as it isn't turn based, AoH2 may live even live further than AoH3 as AoH3 is dying now and code modifications were very rare but very important for AoH2 and is the main reason why a part of the player base clings to the dying game

Edited April 11, 2025 by YouravaragebrazilianAoCfan

[Apple 171]

3 hours ago, YouravaragebrazilianAoCfan said:

AoH2 will never die, AoH3 isn't a true AoH game as it isn't turn based, AoH2 may live even live further than AoH3 as AoH3 is dying now and code modifications were very rare but very important for AoH2 and is the main reason why a part of the player base clings to the dying game

Why did people want AoC to switch to realtime anyway? In what way is the best way to make an AoC game to destroy one of the fundamental aspects of the franchise?

[Apple 171]

3 minutes ago, Apple said:

Why did people want AoC to switch to realtime anyway? In what way is the best way to make an AoC game to destroy one of the fundamental aspects of the franchise?

I guess there maybe isn't any other good rts map games on mobile.

[AddPlck 86]

More screenshots:

The author of this project declares that he has bigger plans!

[RostislavMerte 110]

On 4/5/2025 at 6:01 AM, bun_dha4 said:

fucking based, hopefully this leads me to replace 2.5 or uwut if done well

try replacing be2 engine instead because lawd is it buggy.

 

(i play on 2.5)

4 hours ago, AddPlck said:

More screenshots:

The author of this project declares that he has bigger plans!

Update us when he gives an approximate release date. Not exactly a day, a month would be enough. I really wanna try this out.

[AddPlck 86]

A time-saving feature from this:

[uwut 174]

2 hours ago, AddPlck said:

A time-saving feature from this:

wow

[Das Moss Man 485]

Sehr kool

[Guest]

12 hours ago, RostislavMerte said:

try replacing be2 engine instead because lawd is it buggy.

dear russian beaver, i fear every engine is buggy

[Guest]

9 hours ago, AddPlck said:

A time-saving feature from this:

WE ARE SO BACK.

well, i wonder if the lack of connection for the sea provinces are intentional or not.

[AddPlck 86]

23 minutes ago, bun_dha4 said:

WE ARE SO BACK.

well, i wonder if the lack of connection for the sea provinces are intentional or not.

The sea provinces have been connected, but because the role of the map background is not obvious, the sea line will take effect after reloading the map.

[PeteFromPat 422]

Okay this may just be the aoh2 comeback we need

[Guest]

2 hours ago, AddPlck said:

The sea provinces have been connected, but because the role of the map background is not obvious, the sea line will take effect after reloading the map.

makes sense. i forgot about that

[uwut 174]

11 hours ago, bun_dha4 said:

dear russian beaver, i fear every engine is buggy

i agree

[AddPlck 86]

Still, it has some bugs

Because it is based on vanilla, there are still some problems with vanilla that have not been fixed,

For example, after a period of time in the game (e.g. 1000 turns), most civilizations have a relation of 0......

 

As he improves, he will do his best to try to fix them

Edited April 15, 2025 by AddPlck

[YouravaragebrazilianAoCfan 292]

On 4/11/2025 at 9:23 PM, Apple said:

I guess there maybe isn't any other good rts map games on mobile.

I play dummynation on mobile. they cant complain about that, if they want a RTS they should play that. besides I bearly play that thing I love turn based games.

 

We should have a Turn based AoH4 in 2029 (Average of the games delay in between releases)

Edited April 16, 2025 by YouravaragebrazilianAoCfan