1st shooter ive played to really advance the gameplay by giving it legitimate rpg style stats, upgrades, and non linear play. You wont even meet the first boss until youve played a good 5 hours. This is easily my fav. iPhone shooter ( not an fps but a real side scrolling shooter for fans of gamings purist genre). Imagine if Trevor Mcfur for the jaguar had great play mechanics and a deep rpg system of advancement and you get celestial assault.
Luger kidd about Celestial Assault