I've just bought a copy of SCDA (yep, I'm way behing) and I'm really enjoying the Versus mode (when I can find anyone online, that is). Problem is, the manual's very sparse on the details.

Apparently I can unlock the third spy suit at Special Agent rank. What do I need to do to achieve it?

How do I improve the three scores (stealth, gadgets and, uh, I forget the other one). Spend the whole game not being seen? Do a lot of hacking?

The spy icons on the minimap seem to differ every time I play. Do the icons indicate what gadget the spy has equipped? I assume a blue icon means the spy has a full file downloaded.

You have three rankings on each side.(Spies and Mercs)

Spies:
Gadgets: use a lot of grenades to flash the enemies and to obscure yourself with smoke around the enemies

Stealth: basically, don't get shot during the missions

Athletics: do a lot of special moves like the diving over walls and diving forward into a vent

Mercs:
Gadgets: get a lot of kills with the drones and grenades

Recon/Tracking: be good at tracking and killing the spies

Contact/whatever the third one is: do a lot of knocking the spies out and giving them the headbutt of doom

Ha ha ha, it was dumbed down so much to make the game more approachable for newcomers and it is still too confusing.