Our March 2009 tech demo of Duality ZF, our dual play Xbox 360 2D shooter:

Duality ZF, showcasing survival mode and dual play.
(Note:  Ground animations are disabled.)

Survival mode is a one-life score run, only one of six game modes in Duality ZF.  Dual play is one player controlling two fighters at the same time.  One only player is playing in this video preview.

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Also See:

• Duality ZF
• New Duality ZF Screenshots
• Duality ZF FAQ Answers
• Duality ZF October 2008 Alpha Demo
• Xona Games Social Networks  (twitter, facebook, youtube)

External Links:

• Duality ZF on Xbox Forums (xbox.com)
• Xona Games (YouTube)
• Xona Games (Facebook)
• Xbox LIVE Community Games (xbox.com)
• Xbox LIVE Community Games Forums (xbox.com)
• Imphenzia Music

About the Author:  I am Matthew Doucette of Xona Games, an award-winning, team-of-two indie studio concentrating on "intense retro" games (Xbox LIVE, PSN, WiiWare, and Windows PC). We've released Decimation X (XBLIG), a 1-4 player shmup, #1 best selling and #1 top rated XBLIG in Japan. We're working on Duality ZF (XBLA), a groundbreaking 1-4 player shmup, which placed #1 in Canada and #5 in the world in Microsoft's Dream Build Play 2010 contest. It features dual play, the ability to control two fighters at once, and a massively upgradable 32-stage spread/laser weapon system. 4 player dual play allows up to eight fighters at once.  Many of these features are never before seen shoot'em up firsts. Both games feature beautiful electronic Imphenzia soundtracks.  Help spread the word with our official dualityzf.com and decimationx.com websites.

P.S. Watch out for Score Rush (official website scorerush.com), another 1-4 player shmup. Coming soon to XBLIG.

*Shmup also known as: shoot'em up, 2D shooter, scrolling shooter, space shooter, spaceship shooter, retro shooter, etc.