- A store thumbnail for the game page
- Concrete, metal plate and corrugated-metal surfaces showed red-and-black "missing texture" checkerboards for players. They now use textures the game generates itself, so every level looks right
- Camcorder effect (Settings): VHS colour, scanlines, tracking glitches, a blinking REC, tape counter, battery and a 1996 date stamp
- Found footage: with the camcorder on, the signal breaks up when an entity is close, and goes to NO SIGNAL when it gets you
- New Look setting: Normal, CCTV (black and white security camera) or Dreamcore (soft and pastel)
- Wear and tear: water stains on ceiling tiles, damp carpet, wall scuffs, rust streaks, posters, missing and sagging ceiling tiles
- Optional head bob and sway, motion blur while sprinting, and a vignette
- Auto quality: picks Low, Medium or High from your frame rate
- Soft bounce light under every ceiling light, so rooms take on the light's colour
- Haze tuned per level: steam in the tunnels, sea mist on Level 7, dust in the Lobby, clear air in the Poolrooms
- Dying lights burn warmer and zap when they flash back on; exit signs glow down the corridor
- Glossier wet floors, live reflections on High, and moving water light (caustics) in the Poolrooms and on Level 7
- The background blurs while you read a document, and the camera breathes while you hide
- Frame-rate cost was only measured on a fast PC; use Low or Auto quality if it runs slowly
- Co-op for up to 4 players: host a lobby or join one from the Play menu
- Everything is shared in co-op: keycards, items and rewards
- Caught players spectate a teammate; if anyone escapes, the whole team moves on
- Hiding spots: lockers, desks and vents. Crouch still in a dark corner to be hard to spot
- Throwable glass bottles: the smash lures entities away (find them or buy them in the shop)
- Survival meters drain 30% slower
- Entities hunt whoever is closest or in sight
- Pausing in single-player now freezes the entities too
- The game is now listed and launched as a single-player game (co-op came later, in 0.4.0)
- Graphics quality setting (Low / Medium / High) in Settings, so the game runs on weaker PCs
- Footstep sounds that change with the floor: concrete, carpet, tile, wood, metal, water, snow and grass
- Being caught now has a death lunge: the entity rushes into your face before the death screen
- Three hidden levels, reached through rare entrances: Level 37 "The Poolrooms", Level Fun =) and Level ! "Run For Your Life"
- New entities: Smilers, Skin-Stealers (they wear a teammate's name in co-op), Partygoers, the Thing on Level 7 and Mimicry
- Credits tab crediting every Backrooms Wiki author whose work is adapted
- Almond Water (Level 4): restores thirst and sanity
- Content relating to the Backrooms is licensed under Creative Commons Attribution-ShareAlike 3.0 and all concepts originate from backrooms-wiki.wikidot.com and its authors. Pixel Backrooms, being derived from this content, is also released under CC BY-SA 3.0.
- Level 3: iron bars, scalding sludge and breakers that black out the lights
- Level 4: windows that aren't blacked out are traps, don't look outside
- Level 6: light doesn't work at all, follow the sound of waves to the stairs
- Level 7: a dark, freezing sea with narrow walkways
- Level 9: suburb streets at night, fog rolls in and the hunters get bolder
- Levels 10 and 11 renamed to match the wiki: "Bumper Crop" and "The City That Never Sleeps"
- Hounds hesitate while you hold their gaze
- Louder footsteps
- You could see through walls when standing right against them
- Hiding under a desk put your view on top of the desk
- Lockers now have slats you can look out through
- You can climb out of deep water (face the edge and press Space)
- Co-op has only been tested on one PC so far
- Pixel Backrooms, ported from the browser game to s&box
- Levels 0 to 20, then endless generated levels with their own realities (dream, corrupted, machine, void and more)
- 18 kinds of entities that see, hear, chase and search for you
- Survival: health, stamina, flashlight battery, hunger, thirst, sanity, temperature, corruption and radiation
- Keycards, generators, documents, artifacts, rare rooms and reality portals
- Shop, skills, research, factions, quests, achievements, a codex and stats
- Sounds: synthesized like the original, plus a few from the s&box library
- Realistic lighting and materials, with a Retro Pixel style option in Settings