Go to the Password menu and enter the following:

#AXO/A4YYA

TOX0/AX>TU

T/XO/AZ<#*

#/XO/A4<LY

T#XO/AX<<<

##XO/A><UZ

#YXO/A>YOL

T#XO/AX>TU

#XXO/A4>Y+

T<XO/AXA<=

Cruise Throttle

TU Extra Ammunition

Elemental Mech

Tarantula Mech

Extra weapon Variants

Invincibility

Jump Jets

Mech Variances

Extra Heat Sinks

Unlock all missions