Stargate

1 ABEA-EADY Start with 0 grenades
2 NPEA-EADY Start with 99 grenades
3 AAEA-EAFG Infinite grenades
4 AKEA-EADW Start with 3 lives
5 NPEA-EADW Start with 99 lives
6 AA5A-EAH6 Infinite lives
7 NPEA-EADT Start with 99 continues
8 AA5T-EAD2 Infinite continues
9 NPEA-EAD0 Start with 99 alien grenades
10 AAEA-EAE2 Infinite alien grenades
11 C27A-CA6W + BT7T-CA3E Protects against most enemies
12 AA5T-EAC4 Don't lose energy when you fall off screen
13 ACHT-CAHL Protection against floor spikes
14 A0NA-AAHC Pick up five mission objectives for each 1 you get
15 ACBT-CAHE Extra life worth nothing
16 ALBT-CAHE Extra life worth 2
17 ACBT-CAGR Energy icon does nothing
18 JCBT-CGGR Energy icon restores energy to full
19 ADXT-CAGA Machine gun does not heat up
20 LDXT-CAGA Machine gun heats up quicker
21 RHXT-C61A Machine gun cools off instantly
22 AC0T-AAG0 Invincible after you get hit