The Great War of the Worlds



The Great War of the Worlds

Inventorum Development Team
An alternate history Total Conversion by the Inventorum Development Team

  • efrenespartano: sprite & ruleset designer
  • alinare: artwork & ruleset designer
  • Luke83: map specialist
  • Noah183: main debugging
  • DarkDust: support debugging

Set in an alternate timeline where the Martians of the H.G. Wells masterpiece really invaded Earth in 1896.
Swept by bacteria, the invasion came to an end just a couple of weeks after it started.
Humanity united and rebuilt and prepared for the worst. 12 years later, the mankind's worst nightmares came true. In 1908 the Martians launched a second invasion, this time more deadly.
Since they crash landed in Tungunska, their progress has been almost unstoppable.
From the Siberian tundra to the African jungle and the American Midwest, half of the world belongs to the Sons of Ares
What remains of the humanity united under the banner of the Coalition of Nations and have gone on the offensive.
Your unit is one of elite, formed with the best that the armies of the world have, the International Expeditionary Force.
The year is 1914.
This is the War to End All Wars.

Special Thanks to (in no particular order):

*Hobbes, his help is invaluable and always solves my questions about Geoscape & ruleset editing.
*bulletdesigner, for making the original Chimera map (now called Conqueror).
*Solarius Scorch and Dioxine, for their Village terrain, also kind words, inspiration and ruleset reference from their projects, The X-Com Files and X-Piratez.
*Meridian & Yankes, for making the wonderful OXCE and answering our many many questions.
*Tekamthi, for his modified Alien habitat terrain (modified and further expanded by Luke83).
*ohartenstein23, for his awesome tips, cool codes and constant help.
*ivandogovich, Anon011, TarzanCZ, davide, chaosshade, BlackStaff, SG_Barton, Hashirama015 & SquirrelofNukes for their kind comments and support.
*stosstruppen1918, sturmsoldat_des_kaisers & m_ww1_memes, ino_bartula, __robo__, scgex, mighty_mega_max, daniel_gautreaux and the one hundred followers for their huge support on social media
*130° División Blindada [130_L] efrenespartano's World of Tanks Blitz clan, for being our first beta testers.


*Artwork, Mutant Crusher, ideas & ruleset editing by alinare
*French translation by BlackStaff
*Modified Heat Ray weapons, based on sprites by Civilian
*Bullet sprites by drages
*craftWeapon Bombs fire sound by Nord
*General artwork, spanish translation, vehicle, weapon and soldier sprites & ruleset editing by efrenespartano
*Mechtoids by Harald_Gray
*Tech-Comm reference codes by Hobbes
*All of the Martian Machines mapsets, Infested maps, plus ideas by Luke83
*Main debugging plus ideas by Noah183
*Hand-to-hand combat, craft shields & crewed Turrets by ohartenstein23
*DeepAliens UFOs by tollworkout
*Triffids and Heay Ray bullet sprite by SideQuests
*Celebrate Diversity, Ravager sprites, Cavalry Sabre and Recolored Alien Compilation by Solarius Scorch
*Original GeoIcons GlobeMarkers by SupSuper

*Most of the backgrounds are exclusive photos kindly provided by Stosstruppen1918

For the intro music
IDT Hephaestus Wrath sound
Thunder by Spennnyyy
Anvil & Steel Hammer by Benboncan

TGWotW intro

Download an epic battle soundtrack here! Download separate from the main mod to reduce file size.

Known issues:

*This is an open alpha, only the Tier I & II human weapons, Martian and their guns, plus six Tripods and three UFOs are available.
*The Geoscape is almost done, but the unique missions are still WIP. Expect to still find vanilla enemies.
*The weapons are very unbalanced
*The Triffids may crash
*The custom damage types are not in the Martian armors yet
*Custom research still not available yet
*Some tiles in the Trench map are buggy *FIXED*
*The Medikit UI is not complete, to exit the interface, you need to tap below the last number *FIXED*
*Issue with Commonwealth Field/Gas Mask uniform, missing info & buttons (found by BlackStaff) *FIXED*
*Various UFOPedia pages about Line Infantry (Mechtoids) are crashing (found by BlackStaff) *FIXED*
*Advaced Firearms and Improved Metalurgic Techniques pages are crashing (found by BlackStaff) *FIXED*
*French & Spanish translations are still WIP, expect some words in english.
*Could be hidden bugs and crashes. Don't forget to report them!

*Try the weapons as much as you can, we want to balance them and your feedback will be fundamental to do it. At the moment, we have not included all the features and we have maintained research, races and vanilla weapons. In theory it should serve along with any other mod. As soon as we launch the complete version, we will deactivate most of the vanilla stuff

How do I install this mod?

First you need to get a legal copy of Xcom: UFO Defense. You can get it at Steam or :) Download the latest OpenXcom Extended (OXCE) version here, available for PC, Android, macOS and iOS. Put your original Xcom data inside /UFO folder


- Open your "user" folder
- Copy the entire TGWotW folder to the "/mods" folder,
- Enable the mod from the Game Options menu.
(Instructions by Luke83)
- Open your "openxcom" folder inside the root of your Android device,
- Copy the entire TGWotW folder to the "/mods" folder,
- Enable the mod from the Game Options menu.

How do I provide feedback?

Please, ask suggestions, report any bugs and crashes in the comments box below. We love to reply comments here!
You can send them to too!

You could also post all of your questions, feedback and other things in the OpenXcom Forum TGWotW's topic!

Our kameraden in arms:

@stosstruppen1918 on Instagram



The purpose of this project is to entertain. The creators do not look for a renumbering with this. Use resources and images owned by third parties. All rights belong to their legitimate creators. For this reason, it is absolutely forbidden to sell, buy or market this product.


15 of 104320 (1 today)efrenespartano


tgwotw_alpha_v0.4_mki.zip27.2mbv0.4 Mk I Alpha

tgwotw_alpha_v0.3_mki.zip27.95mbv0.3 Mk I

tgwotw_alpha_v0.1_mki.zip23.91mbv0.1 Mk I Alpha


Thunder_andr @thunder-andr

Will there be a Private Baldrick and a Captain Blackadder in the mod 馃槄 ?

efrenespartano @efrenespartano


I have a cunning plan...

Thunder_andr @thunder-andr


Guest @guest

Their tripods are no match for My bayonet!

efrenespartano @efrenespartano

CHARGE! For the Glory of the Motherland!

Guest @guest

Everyone! Quickly Sneeze on their tripods!

efrenespartano @efrenespartano

HAHAHAHAHAHA We'll definitely need a Sneezer gun in the mod.

Guest @guest


efrenespartano @efrenespartano

I would be nothing without the powerful support of my kameraden in arms. Thank you, kamerad.

Guest @guest

EEEY, The long wait is over, time to test this!

efrenespartano @efrenespartano

Great! :'D We will update the mod in a few days, to fix the bugs already found and add some more content, to continue with the testing. ;)

As always, Yataka Shimaoka, don't hesitate to ask suggestions. :D