Mass affects roleplaying (see what I did there)

I'm playtesting a friend's system.

I've been wanting to run a Mass Effect game.

There's no official Mass Effect table top game.

There's a ginormo-metric-shit-ton-load of official Mass Effect information.

Said friend's system is setting neutral.

Copy Pasta, don't fail me now.

Really, the only question is: "How much information do I shove at my players?" Complete information is really too much, vignettes are really too little.

I think I'm going to throw it all at my players and see what sticks.