Taito has updated its acclaimed iOS shoot'em up Space Invaders Infinity Gene with a new version that offers a new Survival mode, universal app and retina display support, compatibility with Game Center and OpenFeint 3.7.4, and more achievements.

Survival mode allows players to take multiple Extra and Chimera stages in sequence. It also features Darius-style branching stages and multiple endings. Players can unlock new stages in Survival mode through the Evolution Gauge.

The update is free if you already have Space Invaders Infinity Gene on your iPhone/iPod Touch/iPad. And if you don't have the game yet, you really should grab it -- it's only $4.99 on the App Store!