C2C7-6D0F Infinite lives
DF66-0F00 + CB66-0FD0 + DD66-0F60 Start with 1 life instead of 3
D466-0F00 + CB66-0FD0 + DD66-0F60 Start with 2 lives
D066-0F00 + CB66-0FD0 + DD66-0F60 Start with 4 lives
D966-0F00 + CB66-0FD0 + DD66-0F60 Start with 5 lives
D566-0F00 + CB66-0FD0 + DD66-0F60 Start with 7 lives
DB66-0F00 + CB66-0FD0 + DD66-0F60 Start with 9 lives
DF6C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 1 life instead of 3
D46C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 2 lives
D06C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 4 lives
D96C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 5 lives 
D56C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 7 lives
DB6C-A709 + CB6C-A7D9 + DD6C-A769 Continue with 9 lives
6D80-6DD1 + DD80-6D01 Spiral motion gun takes less time to power up
DD80-6DA1 Spiral motion gun takes much less time to power up
6D84-6F01 Spiral motion gun can't get over- charged
DD68-6DDB + CB6C-67AB + 7D68-6D6B All FORCE satellites have 1 unit of 
power--but can't exceed 1 unit
DF68-6DDB + CB6C-67AB + 7D68-6D6B All FORCE satellites have 2 units of 
power--but can't exceed 2 units
D468-6DDB + CB6C-67AB + 7D68-6D6B All FORCE satellites have 3 units of power
C267-A4D9 Once FORCE has been obtained, keep it forever