Online multiplayer competitions always raise the bar for replayability and some extra excitement in a game. Thunder Game Works finally brings that enjoyment to Trenches by including full support for Game Center’s global matchmaking system.

The online matches closely resemble the already established Bluetooth and Wi-Fi multiplayer ability. Choose amongst Quick Match, Battle, King of the Trench, and Zombie Horde game modes. For Battle and King of the Trench, you will need to choose cooperative or versus. During setup of online play, you’ll likely notice no map selection and no fine tuning, including difficulty level choice.

Each match consists of two-players, either opposing or a team of two human players vs the artificial intelligence opponent. You can either allow Game Center to automatically match you or invite one of your Game Center friends. In co-op mode, your team is pitted against the AI, which will increase in strategic difficulty when moving onto the next skirmish.

In our initial tests, performance was completely up to par. Voice chat seemed quite flawless, providing both the ability to taunt enemies in versus and efficiently strategize in cooperative. Thankfully, if you become tired of hearing the other player’s voice, you can mute the speaker. Microphone disabling is also possible, in case you have a brief local discussion that you wish to keep personal.

Trenches v1.9 features:

• Over 20 achievements through OpenFeint and nearly 30 GameCenter achievements
• Bluetooth, Local WiFi and GameCenter global multiplayer with VoiceChat
• Zombie Horde … who doesn’t love Zombies?
• Original Voice Talent
• Original Musical Scores
• Adaptive Difficulty
• World Class Art
• Captivating Gameplay
• Mini-game as good as some stand-alone games
• Tons and Tons of Cowbell
• Listen to your own music

Trenches is designed for iPhone and iPod touch running iOS 3.0 or later. Game Center features require an iPhone 3GS, iPhone 4, 2nd generation iPod touch or later running iOS 4.1 or later. Trenches is available in the App Store for $.99.