I find the Sky mines to be one of the most insane secondary weapons.
Also, the minigun, does anyone else have the trouble that it seems to have very limited range?
As said before, if i were to make just one change, swap levels 11 and 12. 11 is WAY harder than 12, to the point where 12 seems kind of anti-climatic.
Awesome game though, recommending it to friends, 5/5
Also, your numbers are wrong. Regularly having sex using a condom for a year results in 2% pregnancy -- with proper use. Typical use is more in the 80something% range for a year. I don't know where you got that 50.
condom + tubes tied -> pregnancy? seems virtually impossible. unless she had just gotten her tubes tied less than one month ago, there shouldn't have been any eggs in there.