Aegis Defense

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.