#AXO/A4YYA         Cruise Throttle (allows you to set your mech's speed)
TOX0/AX>TU          Extra Ammunition
T/XO/AZ<#*            Elemental Mech (a very small mech)
#/XO/A4<LY            Tarantula Mech (Spider style mech)
T#XO/AX<<<           Extra weapon Variants (more weapon combinations)
##XO/A><UZ           Invincibility
#YXO/A>YOL          Jump Jets
T#XO/AX>TU          Mech Variances
#XXO/A4>Y+          Extra Heat Sinks
T<XO/AXA<=         Unlock all missions (be careful with this one)
 

Thanks to Revolution readers Justin, Antonio Torres, and Scoopster!