Disregard my last comment. Seems like the 4th ending IS possible, but you have to either be very patient, or send in 80 soldiers to the final square every 2 days.
I really enjoy being able to choose between murdering everything in my path, or trying to be sneaky and hack all the computers without killing anyone. On the first playthrough, I went violent (with about 25 violent completions), then after I fully upgraded, went and tried the pacifist victories. It's very fun and I haven't gotten bored yet. :P
Took me a good 40 minutes to beat the final level. Get 4 turrets to the 3rd level as fast as you can to push back the Creeper, then build Collectors all over the 1st/2nd levels. Then build a good amount of Speed/Reactor/Storage units (I went 10/10/20), and build up from that. I hope you make some kind of editor for this game so we can make our own levels. :D Anyway, 5/5. Great game.
Love the game. It's not just watching for patrols, the AI patrols like a real live being would. Though, you need to be able to kill the guards. Or drag a body somewhere else so you don't have to wait for the alarm for mission successful. Other than that, very cool game. 5/5
Am at home and tried this again. Went from (A Tactics ; E Compassion) to (B Tactics ; A Compassion). Should really be a badge on here to get A for both.
Loved this game. Very odd setup, though. Like Ping, Fully Loaded, and It's Already Too Late. I felt like I was being watched in Red Light, Green Light, though... Creeper. >.> Naw, but seriously. xD Great game.
 "Rebuild"){kind=icon}
 "Flight"){kind=icon}
 "ShellShock Live"){kind=icon}
 "I Am An Insane Rogue AI"){kind=icon}
 "Bubble Tanks TD 1.5"){kind=icon}
 "N3wton"){kind=icon}
 "Creeper World Training Sim"){kind=icon}
 "Record Tripping"){kind=icon}
 "Drop Dead: Final Cut"){kind=icon}
 "The Conduct Quiz!"){kind=icon}
 "Ultimate Assassin 2"){kind=icon}
 "Dead Frontier: Outbreak"){kind=icon}
 "YouKongregate"){kind=icon}
 "Take Something Literally"){kind=icon}
 "GeoSketch"){kind=icon}
 "Bloons Tower Defense 3"){kind=icon}
 "The Tickler"){kind=icon}
 "Frontline Defense Beta 2"){kind=icon}