Alright, time to bring back to life the old school game: chicken invaders, from the one who used to be my best friend in childhood, he's got some words for you and here they are: I was going for no deaths from the beginning. I didn't hack the unlockables, I earned them legitimately. I specifically turned on two handicaps, one that makes you start with a single life and one that disables extra lives. This way you are forced not to die and receive 20% bonus score. At the first Henterprise encounter I was killing the chicks for powerups. It takes time, but it boosts your firepower early so it's easier afterwards. I wanted to make this single-segment, but I quit on wave 17 to turn on Weapons Rush(for early chance at the fork weapon) and Space Ninja(for the damage bonus). Keys and powerups(after reaching max power) are not priorities when going YOLO. I used a lot of missiles in the last 2 systems to maximize my chances of survival. I didn't dump the rest at the last boss although that would have made him easier to kill. I didn't skip the ending cutscene, but after it you can see the medal I received and the final score.
How to play on my fully unlocked profile: Open your ProgramData, InterAction studios, CI5, 5.00 and move the files containing .pro as those are your current saved profiles. Then download this http://1drv.ms/1DcZ1OJ unzip it and replace the .pro files with the ones in the archive. Start the game and enjoy not having to grind keys for 30 hours.