Signal Acquired: Writing and Direction (1080p; 9:36) features some good interviews with Andy Weir and Ridley Scott among several others, while also offering some looks at elements like animatics.
Occupy Mars: Casting and Costumes (1080p; 14:13) is kind of an odd "combo platter", but includes more interviews (obviously culled from the same sessions as those utilized in the above featurette) while also providing some info on some of the spacesuit design.
Gag Reel (1080p; 7:33)
Ares III: Refocused (1080p; 17:18) is a kind of faux documentary about the events surrounding Watney's predicament.
Ares III: Farewell (1080p; 3:35) is another supposed documentary, this one hosted by Mark Watney who introduces the crew.
The Right Stuff (1080p; 3:20) is more "found footage" stuff supposedly documenting the crew's isolation training.
Ares: Our Greatest Adventure (1080p; 3:39) is, yep, you guessed it, yet another fake documentary, this one hosted by none other than Neil de Grasse Tyson (who looks fantastic in 2035!).
Leave Your Mark (1080p; 1:03) follows in the above rut by presenting another fake piece, this one an Under Armour commercial profiling Mark Watney. No, this is not a joke. At least on my part.
Bring Him Home (1080p; 1:34) is another pretend commercial focusing on the global interest in rescuing Watney.
Theatrical Trailer (1080p; 2:55)
Production Art Gallery (1080p; 16:39) offers both Manual step through and Auto Advance options. The timing is for the Auto Advance mode.