Type those codes during the game, but take care that none of your
 colonists is active:

 GSABOFF        Technician appears at cursor position
 GSABOG         Bog weapon appears at cursor position
 GSACMDR        Commander appears at cursor position
 GSAHEAL        Heals all colonists
 GSAKILL        Kills chosen chararcter
 GSAKNIFE       Knife appears at cursor position
 GSAMEDI        Doc appears at cursor position
 GSAROOF        All rooms visible
 GSASTOP        Stops all activities of colonists and aliens
 GSASWAP        Control aliens
 GSAWIN         Successfully end level