Cannon Fodder

At any time go to the save game option. When the game requests a name,
 simply enter `JOOLS'. Cheat Mode Active will now flash at the bottom of
 the screen and you'll find that your lead trooper has become a sharp
 shooting 4 star general.


Supa Dupa weapons

 
 Supa Dupa Missile Boosta - Mission 8, Phase 3:
 Go to the bottom right corner of the screen and it's hidden behind a
 big bush.

 Supa Dupa Bullet-Proofa Vest - Mission 12, Phase 4:
 After yov've blown up the turrets and boarded the helicopter fly, to the
 top right corner of the screen. The vest is hidden in the fat snowman.

 Supa Dupa Rank Boosta - Mission 16, Phase 2:
 Top left corner of the screen. It isn't hidden and it looks like a sign
 for a general (four stars).

 Supa Dupa Troopa Boosta - Mission 20, Phase 1:
 This is a big yellow S in the middle of the screen on quite an easy
 level. It's still worth getting since it improves your rank until you die
 and it gives you a Bullet-Proofa Vest, Missile and Rank Boostas for the
 phase. Watch out when you pick it up though, because there is a spike
 nearby.

 Supa Dupa Troopa Boosta - Mission 22, Phase 2:
 It's in the bottom right corner of the screen and is guarded by a turret.
 It's best to blow up the helicopter with grenades to start with, then
 rocket the turret before getting the Troopa Boosta.