Deep Stratum Defense

In this rogue-like tower defense, you're an AI whose mission is to explore deep caves, collect valuable resources, and combat hostile alien creatures.

Welcome, 9H3B. As the overseer of mining operations in sector Zeta, your primary objective is to extract precious ores that lie hidden within the depths. However, be prepared to face formidable resistance from hazardous life forms lurking in the darkness. Your strategic prowess will be put to the test as you deploy mining bots, utilizing the resources you gather to strengthen your defenses.

Success in your mission holds the key to expanding our galactic presence. With each triumph, we can establish a stronger foothold in the vast reaches of the cosmos. The fate of our expansion rests in your hands, 9H3B!

Instructions

Left click in open areas to place a tower (it takes 25 ore).

Place towers directly next to ore deposits to collect (top, bottom, left, or right; no diagonals).

Each ore deposit contains 250 ore.

Towers can only be placed in areas that have been seen.

Arrow keys to move the camera.

Collect 10,000 excess ore to win the level.

When a tower is destroyed, it leaves a foundation behind; those foundations can't be built over but can be cleared to make the tile available again.

Click on a tower to select it; you can then upgrade it's damage, range, or rate of fire with the 1, 2, and 3 number keys respectively.

To sell a tower or clear a foundation, click on it and type "x".

Tip: You get back all the resources for the tower and upgrades, so it's better to sell towers before they are destroyed. You can also move towers this way.

The game does not currently have any progression, but the levels are procedurally generated.

The tilde key (or back tick key) can be used to turn on cheat mode. Further instructions are provided in game.

Change notes

1.2.0: Added upgrades, can sell towers, can remove tower rubble, towers lead their shots, increased ore amount, increased goal amount, and randomized all levels.

1.1.0: Added sounds, spider aliens, alien waves, updated UI, and made other improvements and bug fixes.

1.0.1: Fixed license and readme packaging so it is accessible in the release package.

Credits

Creature images

Stephen Challener (Redshrike), hosted by OpenGameArt.org

https://opengameart.org/content/scifi-creature-tileset-mini-32x32-scifi-creature...

Licenses:

* http://creativecommons.org/licenses/by/3.0/

* http://opengameart.org/content/oga-by-30-faq

Changes: Made background transparent.

Explosion image

JROB774

https://opengameart.org/content/pixel-explosion-12-frames

License: http://creativecommons.org/licenses/by/3.0/

Stone and grass image

Moosader

https://www.deviantart.com/moosader/art/Public-Domain-Tiles-210769545

License: http://creativecommons.org/publicdomain/zero/1.0/

Changes:

• Pulled the stone and grass images into their own files.
• Created a new image by merging the grass and stone images.

Rock wall image

Spring Spring

https://opengameart.org/content/rock-wall-tileset

License: http://creativecommons.org/publicdomain/zero/1.0/

Changes: Resized

Turret image

Nineball

https://opengameart.org/content/pixel-art-scifi-turrets

License: https://creativecommons.org/licenses/by/4.0/

Turret base image

Nido

https://opengameart.org/content/tower-defence-basic-towers

License: http://creativecommons.org/publicdomain/zero/1.0/

Changes: Resized

Ore image

bluecarrot16

https://opengameart.org/content/lpc-ore-and-forge

Licenses:

* https://creativecommons.org/licenses/by/4.0/

* http://creativecommons.org/licenses/by/3.0/

* http://www.gnu.org/licenses/gpl-3.0.html

* http://opengameart.org/content/oga-by-30-faq

Monster den

Redshrike

https://opengameart.org/content/lpc-beetle

Licenses:

* http://creativecommons.org/licenses/by/3.0/

* http://creativecommons.org/licenses/by-sa/3.0/

* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

* http://opengameart.org/content/oga-by-30-faq

Changes: Removed background

LUA base class

Joshua Grams <josh@qualdan.com>

https://github.com/JoshuaGrams

License: https://opensource.org/license/mit/

## Bug death noise

Bart Kelsey

https://opengameart.org/content/monster-1

Licenses:

* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

* http://www.gnu.org/licenses/gpl-3.0.html

* http://creativecommons.org/licenses/by-sa/3.0/

## Swish sounds

artisticdude

https://opengameart.org/content/swishes-sound-pack

License: http://creativecommons.org/publicdomain/zero/1.0/

## Turret shot sound

Iwan Gabovitch

https://opengameart.org/content/dull-explosion

License: http://creativecommons.org/publicdomain/zero/1.0/

## Explosion sound

Iwan Gabovitch

https://opengameart.org/content/synthesized-explosion

License: http://creativecommons.org/publicdomain/zero/1.0/

## Money clink sound

artisticdude

https://opengameart.org/content/inventory-sound-effects

Licenses:

* http://creativecommons.org/licenses/by/3.0/

* http://creativecommons.org/licenses/by-sa/3.0/

* http://www.gnu.org/licenses/gpl-3.0.html

* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html

## Monster and rock hit sounds

rubberduck

https://opengameart.org/content/75-cc0-breaking-falling-hit-sfx

License: http://creativecommons.org/publicdomain/zero/1.0/

## Tower place sound

Cough-E

https://opengameart.org/content/machine-shutting-down

License: http://creativecommons.org/publicdomain/zero/1.0/

## Music

remaxim

https://opengameart.org/content/dark-fallout

License: http://creativecommons.org/licenses/by-sa/3.0/

## Wave start sound

VividReality

https://opengameart.org/content/monster-sound-tutorial

License: http://creativecommons.org/licenses/by/3.0/

Changes: Cropped one of the sounds from the collection.

## Idea generation and text revision

I used ChatGPT to generate ideas and to revise some of the text for the game.

## Play testers

Seth Pillsbury