Press www.freespace2.com first then type desired code.
C player collision on/off
SHIFT C toggles countermeasures on all ships.
K destroys your target.
SHIFT K destroys targeted subsystem
ALT SHIFT K does 10 damage to your target.
ALT K does 10 damage to yourself.
I toggles invulnerability.
SHIFT I toggles invulnerability on target.
W gives the player infinite weapons.
SHIFT W gives all ships infinite weapons.
9 scrolls forwards through all secondary weapons
SHIFT 9 scrolls backwards through all secondary weapons
0 scrolls forwards through all primary weapons
SHIFT 0 scrolls backwards through all primary weapons