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 and sprite creator
  • The Reaver of Darkness: overall game balance & ruleset support
  • Andr: sprite creator
  • Warboy: overall modding support


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.

Credits by name:

*alinare: Artwork, Mutant Crusher, ideas & ruleset editing.
*Andr: Craft sprites plus ideas
*BlackStaff: French translation, plus ideas & historic reference help
*Civilian: Heat Ray weapons based on an old mod from him
*DarkDust: Improved German Paperdoll Sprites
*drages: Ballistic bullet sprites
*efrenespartano: General artwork, spanish translation, vehicle, weapon and soldier sprites & ruleset editing
*Finnik: Whistle and Martian Launcher stats modifier script
*Harald_Gray: Mechtoids
*Hobbes: Tech-Comm reference plus help on the forums.
*Kzer-Za: wounding scripts
*Luke83: All of the Martian Tripods, Martian Fleet, infested maps, Forest Rail, Trenches mapsets plus ideas & ruleset editing
*Noah183: Main debugging plus ideas
*Nord: craftWeapon Bombs fire sound
*ohartenstein23: Hand-to-hand combat, craft shields & crewed Turrets
*The Reaver of Darkness: Heat Ray weapons stats, plus help with general balance.
*tollworkout: DeepAliens UFOs (selenite UFOs)
*SideQuests: Triffids and Heay Ray bullet sprite
*Solarius Scorch: Celebrate Diversity, Ravager sprites, Cavalry Sabre, Recolored Alien Compilation, original Trenchcoat spritesheet (french uniform) & boxes
*Stosstruppen1918: general Historic reference and guide.
*SupSuper: Original GeoIcons GlobeMarkers
*Warboy: main debugging support

*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 beta: the Tier I & II human weapons, Martian and their guns, six Tripods, nine Martian Bases, and seven Martian Flying Machines are available.
*The Geoscape is almost done, but the unique missions are still WIP. Expect to still find vanilla enemies.
*The weapons are less unbalanced
*The Triffids, Mutant Crusher, Line Infantry and Ravager disabled temporarily
*The custom damage types are not in the Martian armors yet
*A few starting techs available.
*Some translation on Spanish and French are missing
*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 zip file to the "/mods" folder. You can choose to unzip it or just move the zipped file.
- Enable the mod from the Mods option on the main menu.
(Instructions by Luke83)

- Open your "openxcom" folder inside the root of your Android device,
- Copy the entire TGWotW zip file to the "/mods" folder, You can choose to unzip it or just move the zipped file.
- Enable the mod from the Mods option on the main 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.


23 of 120523 (0 today)efrenespartano


tgwotw_beta_v0.6.3_mkii_on_ne_passe_pas.zip34.06mbv0.6.3 Mk II On Ne Passe Pas!

tgwotw_beta_v0.6.2_mkii_on_ne_passe_pas.zip34.06mbv0.6.2 Mk II On Ne Passe Pas!

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


Guest @guest

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Guest @guest

What a sexy mod! I'll be keeping a good eye on this one!

efrenespartano @efrenespartano

I believe in miracles!
Where you from?
You sexy thing, sexy thing you. 7u7

Hahaha thanks for your support, pal. I'm glad you are enjoying our work.

Guest @guest

10-10-2019_08-14-36] [INFO] Scanning user mods in 'D:/TWoTS 2_33/user/'...
[10-10-2019_08-14-36] [INFO] Active mods:
[10-10-2019_08-14-36] [INFO] - xcom1 v1.0
[10-10-2019_08-14-36] [INFO] - XcomUtil_Starting_Defensive_Base v1.0
[10-10-2019_08-14-36] [INFO] - tgwotw v0.6.2 Mk II
[10-10-2019_08-14-37] [INFO] Loading rulesets...
[10-10-2019_08-14-39] [ERROR] Error in tags: 'FTAG_BUFF_VALUE_TIMEUNITS' unknown tag name not defined in current file
[10-10-2019_08-14-39] [ERROR] Error in tags: 'FTAG_BUFF_VALUE_STAMINA' unknown tag name not defined in current file
[10-10-2019_08-14-39] [INFO] Loading fonts... Font.dat
[10-10-2019_08-14-39] [INFO] Lazy loading: 1
[10-10-2019_08-14-40] [INFO] Loading custom palettes from ruleset...
[10-10-2019_08-14-40] [INFO] Making palette backups...
[10-10-2019_08-14-40] [INFO] Data loaded successfully.
[10-10-2019_08-14-40] [INFO] Loading language...

Guest @guest

Can you we have a extra storage room in the beginning. Every game I start it starts off with me selling most of the gear I start out with and I have to battle with calvery sabers with two or three armed with acutally rifles. however other then that the mod is awesome

efrenespartano @efrenespartano

Sure! I'll increase the storage room and add another General Stores to the starting base. Thanks for playing, your feedback is very important!

Thunder_andr @thunder-andr

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

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