Two hours with the amazingly detailed Red Dead Redemption 2

edited with a better list from reddit user; https://redd.it/9hjxqc

Camp/gang

• The tents in the camp are upgradable, unlock new features. Example: Dutch tent unlocks a fast travel map
• Talk to your gang members during horse rides
• Gang members also loot bodies after a fight
• You have to share a portion of your loot with the camp via 'donations'
• You can sing songs with gang members
• Camps are described as 'homely'
• The camp is optional so it isn't a big cousin that wants to go bowling
• Your allies flank and give covering fire
• Morale is important. Alcohol raises morale
• Keeping the camp happy will give hidden benefits

Story

• The gang is still in it's heyday when the game starts
• RDR2 starts with the Blackwater robbery and afterwards they flee to the Grizzly's.
• The gang left their money in Blackwater
• Arthur could take prisoners, leave them to die in the snowy mountain or kill them on the spot
• When and how you complete missions is irrelevant to the story. This is no Witcher so no multiple outcomes and endings.
• How you complete missions does have an impact on how NPC's react to you

Arthur

• Arthur can swim, but not very well
• Arthur has to wear the right clothing for weather or suffer stamina penalties
• Removing bandanna after committing a crime makes the wanted level go away faster
• No more full outfits but full customization
• Layered clothing
• Tuck your pants into your boots, wear belts over clothing, roll up your sleeves, etc.
• Arthur can get fat or skinny. So eat healthy and exercise
• You can wear dead animals as hats
• You can lose your hat but it will spawn on your horse
• Mirrors reflect and Arthur will make comments: "You are getting old Arthur."
• Arthur get dirt under his fingernails
• You can take a bath
• Beards grow and you have to groom them. Barbers do a better job than you.
• Lighting strikes (which could hit you)

AI/NPC's

• NPC's remember behavior. Example: NPC remembered Arthur helped him after a snake bite
• A farmer will behave differently then a sheriff
• NPC's put bounties on your head and bounty hunters will come after you
• You can talk with every NPC and the remember your conversations
• NPC's comment if you are dirty/bloody
• Most NPC's have terrible dental hygiene
• NPC's react to environment and lean on things
• Townspeople remember your crimes even after you paid your bounty
• All NPC's have schedules
• The AI maneuvers around you, seek cover and even climb houses to gain the high ground.
• If you don't hit NPC's in vital organs they might absorb multiple bullets
• NPC's might fall to the ground but get back up to surprise you
• Hand to hand combat is more dynamic. Faces deform after getting hit. Black eyes, bruises, broken lips.
• People grown when crouching or picking stuff up
• Animal cruelty is a crime. Shoot a dog and someone will tell the sheriff
• When you join a group in conversation they will talk about you too

Gameplay

• You have to pull back the hammer before you can fire
• Gunfights are much slower
• Cover is really important
• When hit you can gain a limp and lose stamina
• You can pet animals. Petted dogs won't bark at you again
• Prisoners can be tied to trees
• Play honorable and gain more bounty cash
• Dollars are as much worth as in 1899
• Shoot hats of people and steal them
• Move-able dead bodies
• Track-able animals
• Shoot horses so they throw off their rider
• Deadeye: now has 5 levels, Level 1 allows for slowdown, Level 2 allows you to paint targets and unleash a barrage of shots, and Level 3 allows you to manually pick your shooting points, etc.
• Shoot weapons out enemies hands
• Crafting weapons, foods, drinks, etc.
• Dive rolling and diving while shooting in deadeye
• Bounties return
• Train heists outside of missions
• Hunt legendary animals
• Hunting with bow gives more money for pelt
• You can see where you hit an animal
• All buildings are enterable
• Fire warning shot at animals and NPC's

Weapons

• Can hold these weapons at the same time: 2 small guns, 2 rifles, lasso, throwing weapons and a knife.
• Guns have stats
• You have to clean your weapons or their stats become lower and they might jam
• Guns sound really powerful and make booming sounds. Sounds carry really far
• Every part of the gun is customizable. From the hammer to the grip.
• Bullets load one by one
• Bow and arrow count as rifle but is stealthy
• Double wielding again confirmed
• Shotguns blow off arms and legs
• Guns have way more recoil
• Bandolier: Ammo capacity for longarm weapons is increased by 50%
• Gunbolt: Base ammo for sidearms is increased by 50%
• Holster: Slow degradation of all weapons by 20%
• You can spin guns when putting them away
• TNT throwing, throwing knives and gattling guns return
• Different types of ammo and ammo is craftable
• Weapons rust

Horse

• Dynamic horse testicles, they shrink in cold weather
• Name your horse
• You can scold or praise your horse
• Whistle radius grows when the horse bond grows
• Horse equipment is fully customizable, from the saddle that has golden pins to the hair
• A Dutch preview said they put dreadlocks in the hair of their horse
• Horses shit dynamically
• Walk your horse around
• Jump from your horse onto a moving train
• Brush your horses. Arthur makes remarks about the horse depending on the horses gender
• Store horses in stables so you have more backup horses
• Horses die and can't be resurrected
• Tell a horse to flee to spare it's life
• Horses kick behind them. In one preview they even killed a man
• Horses have personalities
• Horses move sideways
• Horses can learn tricks

Controls

• Sprinting by tapping (X)
• Weapon system similar to Max Payne 3. Weapon wheel.
• Customizable HUD. Remove at will the radar, HUD or compass
• Aim assist can be tuned down
• First person and 3 third person views confirmed
• Cinematic killcam from Max Payne 3. Depends on your honor level from which perspective you see it.
• Stealth and crouching confirmed
• Tricorn camera's and selfies confirmed

Miscellaneous

• John Marston and Bill Williamson have the same voice actor as the last game
• Opossums play dead like in real life
• Drive-able trains
• The map contains 5 states: Lemoyne, Ambarino, New Hannover, West Elizabeth and NEW AUSTIN
• Dead bodies won't despawn but decompose and attract scavengers
• Newspapers return
• Condensation and glowing heat from bullets
• Snow trails
• Mountains rise above the cloud line. So no dynamic weather
• Hunted animals make terrible dying sounds
• Animals have a different marker than dead bodies
• You are able to pick up most items in the game
• Different camera angles
• Spilled oil has that "rainbow" look to it
• 192 music tracks from original composer
• Physics just like real life
• Honor system returns
• Prostitutes can be used but no full nudity
• Gunfight legendary shooters
• You might find notes in drawers and learn useful information
• Dynamic weather yet again confirmed :)