These are the main interesting points of the Spanish preview at http://www.meristation.com/es/xbox [...] go/1816760
 
- Map 5xtimes bigger than RDR map.
- RDR dynamic world was also the starting point to create a living world in GTA V.
"Our goal is to surpass RDR" said Dan Houser.
- Prisons and Canyons are mentioned
- The satire of the American society will include subjects like "Hollywood, the porn industry, weed smuggling, homeless people, a bankrupt government".
- Underwater world (and underwater caves) and diving equipment confirmed
- Houser said that missions similar to Taxi, Ambulance and Vigilante ones will be back but "probably not identical to the ones in previous GTA cause they wouldn't fit in the 3 protagonists personalities, but the 3 protagonists will have odd jobs to do".
- About the 3 protagonists skills: Trevor will be the skilled helicopter pilot, Franklyn the skilled driver and sniper, Micheal the "smooth operator", skilled and versatile.
- The idea about creating Micheal came from the question: "What would do a typical GTA protagonist (usually aged between 28y-35y) after he retired and he's in his 45ish years old?". "Where's the action?" he'd ask himself.
- Franklyn is looking for a mentor and he finds one in Mike after they meet during one of Franklyn repo man jobs.
- Trevor is an ex military pilot.
- Trevor is inspired in the typical GTA player that only roams around the game creating havoc, death and destruction.
- According to Houser missions types will vary among "big and small events , explosive, infiltration, super spectacular, family, invasion, hostage recovery, heists and robberies. Plus classic GTA missions but updated and improved."
- They played the same mission of GI.
- Euphoria engine is at its best.
- Draw distance improved.
- They haven't seen any popping up in the scenery.
- Cover mechanics have been greatly improved and cover will be very important in the gameplay.
- About the economy Houser says: "you will be able to spend money to buy interesting and fun things… expensive toys. We are still working on the economy but it will be a strong element in the game and players will be eager to make money to spend money. Something along the lines of — I went through all of this to make all this money and now I'm going to spend it on this crazy item."
- Biggest vehicles selection of any GTA game.
- Dynamic music in missions
- No COOP in SP
- MP will be a huge part of the game and it will be very addictive.
- MP has been developed by a separated team and it has been developed as something as important and full of content as SP.
- COOP confirmed in MP

Sum up from : http://multiplayer.it/articoli/110 [...] -york.html
 
- Alamo Sea is the  name of the Salt sea in california, in the background of the desert around the lake you can see Mount Chiliad
- You can select the characters through a radial menu
- In the demo they took control of Franklin while he was in the toiletn.In free roaming when you switch character you don't know what he is doing at the moment.
- During missions switching characters is partially scripted.
- There are 6 turning point in the plot, they will be deep and long missions. There will be multiple endings based on player choices
- The main quest is as long as RDR's one.
- The map is 3 times larger than RDR, if you count the sea(explorable) it's 5 times.
- The map is fully explorable since the beginning.
- Wild dogs confirmed, there will be animals.
- The game has some problems with framerate and there is a lot of aliasing but the complexity and the widht of the scenes rendered are amazing
- The physics engine has been "rewritten"

Rockstar Games nous a confirmé que la ville de Los Santos (soit une réplique quasi parfaite de Los Angeles) sera 4 à 5 fois plus grande que le Liberty City de GTA IV. Et pour avoir une idée plus précise de la chose, il suffit d’additionner l’univers de GTA : San Andreas, GTA IV et Red Dead Redemption pour mesurer à quel point le monde de GTA 5 sera gigantesque ; et le mot est faible…

- The map is 3 times larger than RDR, if you count the sea(explorable) it's 5 times.

- The game has some problems with framerate and there is a lot of aliasing but the complexity and the widht of the scenes rendered are amazing