Here is some more information on MGSV: Ground Zeroes, taken from Eurogamer’s Metal Gear Solid V: Ground Zeroes preview.
A Backstory option can be found in the title screen. According to the writer, it offers ‘the longest, most detailed summary imaginable of the plot of Peace Walker’.
He adds that there is ‘a tonne of incredibly lengthy audio recordings that flesh things out even further’. You can listen to them while playing. He also complains about the complexity of the plot, but this is something most Metal Gear fans see as a plus.
On the gameplay side, the writer states that ‘the more you put into it the more you get out of it’. The game offers a lot of different strategies. some of which were used when a Konami developer raced through the story mission in under 18 minutes but without any alerts.
The Snatchers in the Jamais Vu mission can only be detected by tagging them using the binoculars. The writer feels the mission is ‘ultimately insubstantial’, though, and ends with frustration. He goes on to say that the Deja Vu mission is the ‘real surprise’. The player has to ‘recreate photographs of areas in the level that recall the first Metal Gear Solid’. After the photo has successfully been taken, a cutscene compares it to the original.
On the voice acting, the writer states he has difficulty discerning Big Boss’ voice from Kaz’s. He also thinks Kiefer Sutherland makes him sound ‘too human’, because he feels Snake never behaved like an actual person, who doesn’t get angry or emotional.
The final cutscene is ‘bombastic and lengthy’ and exciting in and of itself. Skull Face leaves behind an audio recording of over 7 minutes in which he explains his motives to a POW.