Aegis Defense is a cyber-themed tower-defense roguelike. Draw cards to place towers and upgrades, then guide a corrupting swarm through the maze you create. Defend your core alone or team up with a friend in co-op mode.

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About This Game

Build your defense from a hand of cards

After each wave, the action stops for a moment. Use your cards to place towers, upgrade them, or weaken the next wave before it appears. You have a limited budget each round, so choose carefully. When you’re ready, hit EXECUTE and see if the Dataphage swarm can break through.

Every run is different

Each run has three sectors with branching paths. Pick your route through battles, shops, events, and repair stops, and take on a boss at the end of each sector. Win fights to earn new cards for your deck or upgrade your current ones. Your Core’s health carries over for the whole Run. Every run is based on a seed. Share it with a friend so they can play the exact same run.

Play with a friend

Play together online or over LAN. Each player has their own deck and hand, but you both defend a single Core on the same board. Watch what your partner is doing, pass them cards, and start each wave as a team.

Keep climbing

Win a Run to unlock higher difficulty levels with stronger enemies. Try Endless mode to see how far you can go, or take on the Daily Outbreak, where everyone plays the same run each day and competes on a shared leaderboard.

Bonus: Arcade mode

This is the classic way to play. Buy and upgrade towers over 20 waves on 7 different maps, either solo or with up to four players.

Features

  • A deck-building Run:  50+ cards in six classes, plus their upgraded form.

  • 15+ Dataphage, with armor, shields, stealth, and flying threats.

  • Seeded Runs with share codes and a daily seed for everyone.

  • Play solo, or with a partner online or over LAN.

  • Iteration ladder, Mastery unlocks, and Endless mode.

  • Combat Trace: see what every tower did, round by round.

  • Arcade Mode: classic 1–4 player co-op defense.

  • Cross-platform play between Windows, macOS, and Linux.

  • Steam Achievements, Cloud saves and leaderboards.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS: Windows 10 (21H2 or later) or 11, 64-bit
    • Processor: Quad-core — Intel Core i5-4460 / AMD Ryzen 3 1200
    • Memory: 8 GB RAM
    • Graphics: GeForce GTX 950 / Radeon RX 460, 2 GB VRAM
    • DirectX: Version 12
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
    • Additional Notes: Steam running and logged in. 1024×600 display minimum.
    Recommended:
    • OS: Windows 10 / 11, 64-bit
    • Processor: 6-core — Intel Core i5-10400 / AMD Ryzen 5 3600
    • Memory: 16 GB RAM
    • Graphics: GeForce RTX 3060 / Radeon RX 6600 XT, 8 GB VRAM
    • DirectX: Version 12
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
    • Additional Notes: Targets 1440p at 240 FPS.
    Minimum:
    • OS: macOS 15 Sequoia or later
    • Processor: Apple Silicon (M1 or later). Intel Macs are not supported.
    • Memory: 8 GB RAM
    • Graphics: Apple M1 GPU or later
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Ubuntu 22.04 or later, or SteamOS 3, 64-bit
    • Processor: Quad-core — Intel Core i5-4460 / AMD Ryzen 3 1200
    • Memory: 8 GB RAM
    • Graphics: Vulkan-capable GeForce GTX 950 / Radeon RX 460, 2 GB VRAM
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
    Recommended:
    • OS: Ubuntu 22.04 or later, or SteamOS 3, 64-bit
    • Processor: 6-core — Intel Core i5-10400 / AMD Ryzen 5 3600
    • Memory: 16 GB RAM
    • Graphics: GeForce RTX 3060 / Radeon RX 6600 XT, 8 GB VRAM
    • Network: Broadband Internet connection
    • Storage: 500 MB available space
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