I've been tracking limited and exclusive titles for the PS4 as well as indie games (games released by smaller publishers or games not typically released in physical format). I also like to track exclusive games for each region (I don't collect Asia-specific stuff for the moment, so I haven't concentrated on that, though I'd be curious if there are any English-language/subtitled games that are available there and nowhere else). I'd like this to be a great resource for collectors going for indie titles (like me) or going for full physical sets (since it is tricky to know what is available in the region you don't live in).
Please suggest any additions. For now I'm holding off on including typical JRPG's and the like since those aren't in the same vein as your typical indie game. I'll only include those if they fit in any of the "exclusive" lists below.
NTSC Releases Limited to a certain store/vendor
Deformers (Regular/Steelbook Editions, both Gamestop Exclusive, 3/31/17)
Don't Starve (Mega Pack) (Gamestop Exclusive?, 5/30/17)
Duke Nukem 3D: 20th Anniversary World Tour (Gamestop Exclusive)
Gravity Rush Remastered (Amazon Exclusive)
Has-Been Heroes (Gamestop Exclusive?, 3/28/17)
Killing Floor 2 (Gamestop Exclusive)
Los Caballeros Del Zodiaco Alma De Soldados (Mexico)
MX vs. ATV: Supercross Encore - 2017 Official Track Edition (Limited Time Release, Gamestop/Amazon)
Prototype - Biohazard Bundle (Gamestop Exclusive, also available from Amazon vendors)
Retro City Rampage DX (Three variants, VBlank Exclusive)
Rez: Infinite (iam8bit Exclusive)
Shakedown: Hawaii (TBA, VBlank exclusive)
Song of the Deep (Gamestop Exclusive)
Ultimate Marvel vs. Capcom 3 (Gamestop Exclusive, 3/31/17)
Wild Guns: Reloaded (confirmed Limited Print Run, only available through online vendors)
NTSC-U Limited Run Releases (Region-free/Manufactured in N. America)
Aqua Kitty DX (LR36, 2800 copies)
Breach & Clear: Deadline (LR14, 3000 copies)
Cosmic Star Heroine (TBA)
Curses 'n Chaos (LR34, 2800 copies)
Dariusburst Chronicle Saviours (TBA, Two Editions)
Dear Esther: Landmark Edition (LR42, 5000 copies)
Dragon Fantasy: The Black Tome of Ice (LR18, 3000 copies)
Dragon Fantasy: Volumes of Westeria (TBA)
Fallen Legion (TBA)
Firewatch (LR32, 7300 copies)
Fault Milestone One (TBA)
Forma.8 (TBA)
Futuridium EP Deluxe (LR6, 2000 copies)
Lone Survivor: The Director's Cut (LR30, 3600 copies)
Lost Sea (LR12, 3000 copies)
Mystery Chronicle: One Way Heroics (LR20, 5000 copies)
Narcissu: 10th Anniversary Anthology (TBA)
Nuclear Throne (TBA)
Oceanhorn (TBA)
Octodad: Dadliest Catch (LR8, 4500 copies)
Oddworld: New N' Tasty (LR4, 5000 copies)
Oxenfree (LR37, 4500 copies)
Plague Road (TBA, Kickstarter variant/Regular issue)
Rabi-Ribi (TBA)
Rainbow Moon (LR16, 3000 copies)
Salt and Sanctuary (TBA)
Saturday Morning RPG (LR2, 1980 copies)
Shadow Complex Remastered (LR17, 6800 copies)
Shantae and the Pirate's Curse (LR25, 6000 copies)
Shantae: Risky's Revenge Director's Cut (LR24, 6000 copies)
Sharin no Kuni (TBA)
Skullgirls 2nd Encore (TBA, 7109 copies)
Stealth, Inc: A Clone in the Dark Ultimate Edition (LR26, 3600 copies)
Sundered (TBA)
The Swapper (LR38, 3300 copies)
The Swindle (LR40, 3000 copies)
Thomas Was Alone (LR22, 4000 copies)
Xeodrifter (LR8, 2300 copies)
YIIK: A Post-Modern RPG (TBA)
NTSC-U Available Indie Titles
88 Heroes (March 2017)
ABZU
Adam's Venture Origins
Agatha Christie: The ABC Murders
Air Conflicts: Double Pack (Pacific Carriers and Vietnam)
Air Conflicts: Pacific Carriers
Air Conflicts: Secret Wars (3/21/17)
Air Conflicts: Vietnam
Alekhine's Gun
Among the Sleep
Anima: Gate of Memories (3/21/17)
Aragami
ArmaGallant: Decks of Destiny (4/4/17)
Assault Suit Leynos
ATV Renegades (4/18/17)
Awesomenauts Assemble
Battle Chasers: Nightwar (TBA)
Battle Worlds: Kronos
Big Buck Hunter Arcade
Brothers: A Tale of Two Sons
Carmageddon: Max Damage
Cartoon Network: Battle Crashers
Darksiders: Warmastered Edition
Deponia
Dungeons 2
Earthlock
Earth's Dawn
Ether One
Flatout 4 (4/4/17)
Geometry Wars 3: Dimensions Evolved (NTSC-Only)
Giana Sisters: Twisted Dreams Directors Cut
Helldivers
Industry Giant II (2/28/17)
Infinifactory (3/27/17)
Kingdom Come: Deliverance (TBA)
King's Quest: The Complete Collection
Kromaia: Omega
Legend of Kay Anniversary
Lichdom: Battlemage
Little Nightmares (4/28/17)
Lock's Quest (TBA)
Lumo
Marvel Pinball: Epic Collection Vol. 1
Micro Machines: World Series (4/21/17)
Mighty No. 9
Monster Jam: Crush It!
Moto Racer 4
Motorcycle Club
Natural Doctrine
N.E.R.O : Nothing Ever Remains Obscure
OlliOlli: Epic Combo Edition
Overcooked
Pac-Man Championship Edition 2 + Arcade Game Series
Portal Knights (5/2/17)
Prison Architect
Professional Farmer 2017
Pure Chess
Pure Hold'Em World Poker Championship
Pure Pool (two cover variations)
Putty Squad
Puyo Puyo Tetris (5/2/17)
Redout (TBA)
Republique
Reus
Rime (5/9/17)
Road Rage (Date TBA)
Shantae: Half-Genie Hero
Sherlock Holmes: Crimes & Punishments
Sherlock Holmes: The Devil's Daughter
Shovel Knight
Steamworld Collection
Stern Pinball Arcade
Stick it to the Man
Stardew Valley (4/11/17)
Styx: Shards of Darkness (March 2017)
Sudden Strike 4 (6/27/17)
Surge (TBA)
Super Dungeon Bros.
Teslagrad
Terraria
The Book of Unwritten Tales 2
The Last Tinker: City of Colors
The Pinball Arcade
The Talos Principle
This is the Police (3/22/17)
Tiny Troopers: Joint Ops
Toki Tori 2 Plus
Torment: Tides of Numenera (2/28/17)
Tower of Guns
Troll and I (3/21/17)
Tumblestone
Valhalla Hills (2/28/17)
Yooka-Laylee (4/11/17)
Ziggurat
Zombie Army Trilogy
Zombie Vikings: Ragnarok Edition
NTSC-U NISA Titles
Birthdays the Beginning (5/9/17)
Cladun Returns: This is Sengoku! (Spring 2017)
Danganronpa 1-2: Reload (3/14/17)
Danganronpa V3: Killing Harmony (TBA 2017)
Danganronpa Another Episode: Ultra Despair Girls (August 2017)
Disgaea 5: Alliance of Vengeance
God Wars Future Past (March 2017)
Grand Kingdom
NAtURAL DOCtRINE
PSYCHO-PASS: Mandatory Happiness
The Silver Case (4/18/17)
Touhou Genso Rondo: Bullet Ballet
NTSC-U Exclusive Physical Retail Releases (some of these fall in the above lists, these are only available in the NTSC region)
Atari Flashback Classics: Volume 1 (EU release March 2017)
Atari Flashback Classics: Volume 2 (EU release March 2017)
Batman: Arkham VR (PSVR)
Brunswick Pro Bowling
Cabela's African Adventures
Dead Rising HD
Dead Rising 2 HD
Duck Dynasty
Duke Nukem 3D: 20th Anniversary World Tour
Geometry Wars 3: Dimensions Evolved
King's Quest: The Complete Collection
Mega Man Legacy Collection
MLB 14: The Show
MLB 15: The Show
MLB 16: The Show
MLB 17: The Show (3/28/17)
MX vs. ATV: Supercross Encore - 2017 Official Track Edition
Pac-Man Championship Edition 2 + Arcade Game Series
Prototype - Biohazard Bundle
RBI Baseball 16
RBI Baseball 17 (3/28/17)
Shantae: Half-Genie Hero
Stern Pinball Arcade
Toy Soldiers: War Chest Hall of Fame Edition
Tumblestone
Wild Guns: Reloaded
PAL/Limited Releases or Country Specific-Exclusives (these are only available in the specified PAL regions)
SPAIN
Alchemic Jousts (GAME exclusive)
Atrapa la Bandera
Baboon! (TBA, GAME exclusive)
Dogchild (GAME exclusive)
Drawfighters (GAME exclusive)
La Voz ("The Voice")
Let's Sing 8: Version Espaniola
Let's Sing 9: Version Espaniola
Levántate All Stars (TBA, April 2017)
Los 40 Principales: Karaoke Party Vol. 2
Mindtaker (TBA, GAME exclusive)
Moerakis (TBA)
Motor Strike (GAME exclusive)
Nubla (GAME exclusive)
Rolling BOB (GAME exclusive)
Singstar: Mega Hits
Strikers Edge (TBA, GAME exclusive)
Tadeo Jones y el manuscrito perdido
Toro (out of print)
Way of Redemption (TBA, GAME exclusive)
GERMANY
Berufsfeuerwehr Die Simulation (Firefighter: The Simulation)
Bridge Constructor (3/2/17)
Let's Sing 2017 mit Deutchen Hits
The Voice of Germany
FRANCE
Let's Sing 2016: Hits Francais
Let's Sing 2017: Hits Francais et Internationeaux
The Voice, la plus belle voix
ITALY
DUCATI - 90th Anniversary (Gamestop Italy exclusive/possible Spain release 3/31/17)
FINLAND
Singstar: SuomiBileet
POLAND
SingStar: Mistrzowska Impreza
PORTUGAL
Singstar: Nova Geração
AUSTRALIA
AFL Evolution (TBA, March/April 2017 expected)
PAL/Indie List (Limited to PAL region only, not available in NTSC regions)
2Dark (3/17/17)
8 Days (TBA - Possible Spain Only?)
Anima: Gate of Memories (NTSC release 2017)
Axiom Verge: Multiverse Edition (TBA, 4/11/17?)
Blackguards: Definitive Edition (TBA)
Broken Sword 5: The Serpent's Curse
Chaos Child (TBA, 3/31/17?)
Constructor HD (4/28/17)
Deadlight Director's Cut
Dead Synchronicity: Tomorrow comes Today
Dex
Dino Dini's Kick Off Revival
Dreamfall: Chapters (3/24/17)
Flockers
Ginger: Beyond the Crystal
Goat Simulator: The Bundle
Heart and Slash
Here They Lie (PSVR)
Hustle Kings VR (PSVR)
Joe's Diner (out in Germany, other PAL countries 3/31/17)
Kholat
Kyurinaga's Revenge
Mount and Blade Warband
Olli Olli 2: Welcome to Olliwood
Pineview Drive (out in Germany, other PAL countries 3/31/17)
Risen 3: Titan Lords (Enhanced Edition)
Rogue Stormers (3/31/17)
Slain: Back from Hell (Signature Edition and Basic Edition)
Silence
Sublevel Zero Redux (Regular Edition 2/24/17, Signature Edition TBA)
Super Meat Boy
Super Stardust Ultra VR (PSVR)
Syberia 3 (4/21/17)
The Count Lucanor (Signature Edition release planned)
The Escapists
The Escapists: The Walking Dead Edition
The Pinball Arcade: Season 2
The Sexy Brutale: Full House Edition (4/11/17)
This War Of Mine: The Little Ones
Trials: Fusion (The Awesome Max Edition)
Unbox: Newbie's Adventure (TBA, Signature Edition Release planned)
Velocity 2x: Critical Mass Edition (TBA, 3/31/17?)
Warhammer 40,000: Deathwatch (2/24/17)
World of Magic: Planar Conquest
Worms: Battlegrounds
Yasai Ninja
Yesterday Origins
Zenith
Other PAL-Exclusive Physical Retail Releases (not available in NTSC regions)
DIRT Rally VR (PSVR)
Don Bradman Cricket
Don Bradman Cricket 17
Forestry 2017: The Simulation
Handball 16
Handball 17
Heavy Rain and Beyond: Two Souls Collection
Infamous: First Light
Journey: Collector's Edition
Lara Croft and the Temple of Osiris (Gold Edition)
Let's Sing 2017
MotoGP 15
Now That's What I Call Sing
Now That's What I Call Sing 2
Professional Farmer 2015
Rugby Challenge 3
Rugby League Live 3
Rugby World Cup 2015
Singstar: Frozen (only released in Spain, Germany, Poland and Portugal)
Singstar: Ultimate Party
Space Hulk
Space Hulk: Ascension
The Voice (U.K. version)
Tour de France 2014
Tour de France 2015
Tour de France 2016
UEFA Euro 2016 (PES 2016 re-issue)
Uncharted: Drake's Fortune Remastered
Uncharted 2: Among Thieves Remastered
Uncharted 3: Drake's Deception Remastered
Zombi
ASIAN REGION EXCLUSIVES WITH ENGLISH DUBBING AND/OR SUBTITLES
Alienation
Bloodborne The Old Hunters Edition
Caladrius Blaze
Dariusburst Chronicle Saviors (3/30/17)
Dead or Alive Xtreme 3
Devil May Cry 4 Special Edition
Fat Princess Adventures
Gundam Breaker 3
Resident Evil Umbrella Corps
River City Melee: Battle Royal Special (March 2017)
SD Gundam G Generation Genesis
Shadow of the Beast
Super Robot Wars OG: The Moon Dwellers
Super Robot Wars V
Sword Art Online: Game Director's Edition