Game · Released

DEFCON

"Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god." - Jean Rostand Thoughts of a Biologist You play the role of a military commander hidden deep within an underground bunker. Your mission - to successfully exterminate your enemy's civilian population whilst disabling their ability to attack your own. Start by launching your battleships, submarines, and bombers in order to decimate your opponent's defences. Scramble together your alliances, but remember only one can stand victorious. Prepare your pre-emptive strike before one

Release date
July 12, 2012
Platforms
Windows, macOS, Linux
Developer
Introversion Software
Publisher
Introversion Software
DEFCON artwork
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About DEFCON

"Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god." - Jean Rostand Thoughts of a Biologist You play the role of a military commander hidden deep within an underground bunker. Your mission - to successfully exterminate your enemy's civilian population whilst disabling their ability to attack your own. Start by launching your battleships, submarines, and bombers in order to decimate your opponent's defences.

Scramble together your alliances, but remember only one can stand victorious. Prepare your pre-emptive strike before one of your supposed allies get the same idea. Choose the perfect moment for betrayal, obliterating your opponents with an apocalyptic thermonuclear barrage, but get it wrong and their devastating counter attack will bring you to your knees! DEFCON is a hell of a ride for a strategy games fan. What can be more thrilling that a world-wide, thermonuclear conflict that wipes out all of humanity from the face of the Earth?

You start slowly, deploying your forces on international waters, sneaking under the radar. Then, as the DEFCON level changes, players are allowed to use aggressive tactics and even start a conventional war. The conflict is slowly but unavoidably heating up as the game progresses and when it reaches a critical level then the ultimate weapons of mass destruction are unleashed. Let the countdown to extinction begin!…

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DEFCON artwork
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DEFCON reviews & player comments

Store ratings and available player reviews. Review snapshots show their last refresh date.

★ 7.8/10GOG · 304 ratings
GOGLast checked November 4, 2026

Most helpful8

★ 5 / 5
This game might look that it could be boring, slow and making you sleepy. It might be that even your first three or four DEFCON…
★ 1 / 5
The game runs ok if you just want to play single player, but LAN or online multiplayer is a no-go. Inexplicably, the game still has…
★ 4 / 5
I really enjoy DEFCON, and have even used it as a teaching tool about nuclear war. Presentation-wise it's one of the most unique games out…
★ 3 / 5
The game itself deserves it. Aside from the steep learning curve and the tutorial being utter crap for online play this game holds some very…
★ 4 / 5
I'll use the old PC gamer review format to show what I consider to be the good, the bad, and the ugly of this game.…
★ 5 / 5
DEFCON this game for me had a creepy connection the same time my copy got in from Intoversion directly the TV show Jericho aired in…
★ 1 / 5
I just get errors that it can't authenticate. I have no idea what that affects, but it seems like some online-DRM issue (which I thought…
★ 4 / 5
Just finished running through the tutorial and a couple of one-v-one games against the computer and all I can say is this game is incredibly…

Most recent8

★ 4 / 5
Deadly game. Everybody dies. I hope mankind doesnt end this way considering all people have experienced.
★ 2 / 5
I bought it 80% off and it felt like a right price. Played some games against AI one evening and that's it. Never really felt…
★ 5 / 5
This game is calm and beautiful in a minimalistic way, it's almost relaxing to play. Which makes it scary in it's very own way.
★ 1 / 5
Game was released a while ago. Seems multiplayer is offline or everybody's moved on. There is a way to add computer opponents. That's what I…
★ 4 / 5
GoG agreed to publish Taiwanese game Devotion, but cancelled it after CCP crybullies were upset that something in the game called Chinese dictator Xi Jinping…

Short excerpts linked to their source. The score above uses aggregate storefront ratings—not these few comments.