Lower payroll:
Transfer all scientists and engineers to another base
just before the end of the month. If they are in
transit at the end of the month, they will not be
paid.
Quick money:
Investigate a crash site, then research "Alien
Alloys". Manufacture a large amount at $3,000, and
sell it for $6,400. Sell all alien bodies except for
one. Research the body, then sell it to receive
$20,000.
Save men:
Note: This trick requires a memory card. Save the
game after starting a mission. Play through your turn
without losing any men, then save the game after the
alien's turn. Continue game play until one of your men
dies. At that point, abort the mission and load the
saved game. Use a different strategy from your last
attempt to complete the mission.