lol i only did this for EXP :) but here you go if your stuck...

Lvl 1
shoot both men fast

Lvl 2 (in order)
kill the guy on the tower
the guy on the left wall
then the right wall

Lvl 3 (in order)
shoot the 2 cameras first before killing(the one on building and wall)
the guy inside the gate
the guy in the guard house
the guy outside the gate(while the other guy is walking away from him)
the guy walking(kill him fast so he wont see the other guys you shot)

Lvl 4 (in order)
kill the guy inside the building(right)
then the man outside

Lvl 5
shoot the generator(the one on the left building)
then kill the guy with the wrench(the engineer)

Lvl 6
kill both men between the buildings
tip: be fast

Lvl 7
kill the guy moving in his window near the hotel entrance

Lvl 8 (in order)
shoot the turret guy
the guy inside the window
the guy on the balcony
then the three dudes:
up(near the building), right(between these ), down(the guy walking)

Lvl 9
kill both guards while each are walking away from each other
then shoot the guy with the briefcase (he will show up at the entrance)

Lvl 10
shoot the guy inside the red car


~FIN