Cartridge Defense
★★★★★ 91% Positive Reviews on Steam

Tower Defense meets Deckbuilding

Collect over 300 unique cards to build your ultimate deck. Place towers, repath enemies, and defend against waves of robots in a cyberpunk-inspired future.

Tesla Towers Card Spire of the Gods Card Eye of Zeus Card Pure Mayhem Card
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FEATURES

Strategic depth meets collectible cards

Cards

300+ COLLECTIBLE CARDS

Build your deck from a massive library of towers, upgrades, abilities, and more. Every card changes how you play.

Towers

9 TOWER TYPES

Each tower can be upgraded to level 5, with unique targeting systems and synergies to discover.

Modes

MULTIPLE MODES

Campaign, Sponsored Mode, Endless Mode, and Rogue-like mode offer endless replayability.

Levels

33 UNIQUE LEVELS

Battle through 5 distinct zones with increasingly challenging enemies and terrain.

Targeting

CUSTOM TARGETING

Fine-tune your tower priorities with a highly customizable targeting system for maximum efficiency.

Robots

CYBERPUNK ROBOTS

Face off against diverse enemy types, each with unique behaviors and weaknesses to exploit.

SCREENSHOTS

See the game in action

Gameplay Screenshot 1
Gameplay Screenshot 2
Gameplay Screenshot 3
Gameplay Screenshot 4

BY THE NUMBERS

Content that keeps you coming back

300+
Cards
33
Levels
9
Tower Types
5
Zones
40+
Hours
91%
Positive

CONTACT

Get in touch

Have questions, feedback, or just want to say hi? We'd love to hear from you.

outgamingllc@gmail.com

PRIVACY POLICY

Your privacy matters to us

Information We Collect

Cartridge Defense is designed with your privacy in mind. We do not collect, store, or share any personal information. The game functions entirely offline and does not require an account or login.

Gameplay Data

All gameplay data, including your progress, card collection, and settings, is stored locally on your device. When using Steam Cloud saves, this data is synced through Steam's secure infrastructure according to their privacy policy.

Steam Integration

Cartridge Defense integrates with Steam for achievements, cloud saves, and purchasing. Steam may collect data according to their own privacy policy. We do not have access to your Steam account information beyond what is necessary for these features.

Analytics

We may use anonymous, aggregated analytics to help us understand how players interact with the game and to improve the experience. This data cannot be used to identify you.

Children's Privacy

Our game does not knowingly collect any information from children under 13.

Contact Us

If you have any questions about this privacy policy, please contact us at outgamingllc@gmail.com.

Last updated: January 2026