Kill every machine in the village.
On top of the platforms on the bridge to Amusement Park.
Investing the maximum of $100000 ($180000 in PlayStation 4 version), will unlock a shop w\here you can buy Meteorite Shards (a rare upgrade material).
Kill 10 villagers.
Lower level, behind the floating machine.
On the roof of a shack on the upper level.
Climb to the upper level and down the first ladder on the right.
On the small, secluded platform. Climb to the upper level and down the second ladder on the right.
Passage to City Ruins
There's a fork in the wooden bridge as you leave the village. One is the path by which you originally arrived, leading back to the Amusement Park. The other ends at a movable box that opens a passage to the City Ruins.
The quest ends when you hand in Nuclear Arms Manual, however, Pascal will give you $1000 for every other piece of Old World intel in your posession as well. You can also hand in the manual to the Commander in the Bunker, which will yield different rewards.