The only cheat with the savegame is that alien gas is researched although only 1 building mission is complete. All tech research is complete (up to personal teleporters) and you have a fleet strong enough to wipe out the alien dimension weekly (but these are irrelevant to the actual point of the savegame).
The real deal is, you have two Annihilators, filled with 36 androids. ALL the androids are equipped with a medikit, full disruptor armor, one devastator cannon, one dimension missile launcher and 12 dimension missiles.
Osiron is a natural enemy (I've been pounding them since week 1) and there are some other organisations that are hostile to you. Don't worry, you have so much cash that you can practically bribe them all up to allied.
I think the objective is quite simple: there is an Osiron building north of your assault base, raid it and see how much of the scenery you can destroy. Before beginning the mission, make sure every squad is set to HOLD THEIR FIRE, since you will get A LOT OF FRIENDLY FIRE if you do not line your men up. Move with auto-fire off, spot the enemy, line your men up and then let your men fire at will. Your squad will be putting out 36 missiles per volley, as well as that many devastator shots, but the cannons are just sidearms. I advise raiding Osiron slums, since slum maps do not have corridor fights and will probably be much more fun.
The savegame is also like an "endgame" save, since you have all technologies. You still have to destroy the alien buildings though.
(the game replaces the first savegame file)