69 is all the older prototype levels you see in the screenshots.
Builds with higher numbers have fewer (new) levels while I iterate on mechanics etc.
History:
v1: Heist
v2: Fire simulation
v3: Settings menu, swimming
v4: Nevada map (early), catch bullets, headshots, parachute, fire modes, torch
v5: Nevada mission objectives (basic), explosive barrels, C4
v6: Nevada improvements, helicopters, drones, alarms, AI
v7: Nevada bunker lighting, polish
v8: Fixed vehicle audio and particle issues
v9: ADS, stun enemies, vsync on by default
v10: More music, improved glass, blue text
v11: Fixed mouse sensitivity and added motion blur settings, psych eval (early)
v12. Fixed weather not reversing
v13: Tanker map, sharks, swimming fixes
v14: Music now reverses, AI improved
v15: Fade in, birds, music only reverses once, ticking sound
v16: New first-person guns
v17: Improvements based on feedback from DARTEKZ
v18: Sniper rifle, bullet holes in glass
v19: Sprint & slide
v20: Mission complete fade out
v21: Gamepad controls (basic), car tuning (basic)
v22: Port map for car combat
v23: Oil rig and car AI
v24: Bugfixes (thanks to IndieG & ZONGE), night vision, destroyable oil rig
v25: Weapon sway (thanks Mikelica & Bookwarrior), fixed snow not reversing
v26: Subway map (early), bugfixes (inc. gun jamming)
v27: Clock mechanism on title screen (thanks IndieG)
v28: Title screen tips/quotes, adjusted Heist boat area
v29: Multiplayer (test)
v30: Multiplayer Subway map (basic)
v31: Multiplayer connect to IP
v32: Multiplayer trains, glass, slide
v33: Heist now prevents player rewinding past hostage rescue with a warning (RECLOCK again to override)
v34: Winter stage, fixed air control bug, added some hints
v35: Added reversable snow and water to Winter, added some hints to Heist
v36: Mission flow (now progresses to next mission on completion)
v37: Fixed some bugs [UE4]
v38: UE5 & Lumen (and some bug fixes)
v39: Lighting fixes
v40: Globe
v41: Bug fixes
v42: "Cold open" music, new icons
v43: Fixed settings sliders
v44: Adjusted snow colors
v45: Fixed some physics bugs
v46: Mouse wheel changes weapon. Expanded New York map.
v47: Fixed some bugs
v48: Tanker ladder hint, bugfixes
v49: Fixed controller and raytracing support
v50: Added Lumen to graphics settings (off by default)
v51: Search enemies for ammo
v52: Oxygen meter for swimming
v53: Press Q to RECLOCK up to 10x faster, and visit the Opera in Chicago
v54: Fixed some bugs
v55: Added gas mask. Press Z to set RECLOCK breakpoints.
v56: CHICAGO can now be completed.
v57: Added Spread to player weapons. Removed instant-heal on RECLOCK.
v58: Improved vehicle camera and audio. Added auto-ascend rope.
v59: Added RPG. Fixed some bugs.
v60: Added grenades and RPG projectile.
v61: Added first person walks/run animations and footstep sounds.
v62: Fixed some bugs. Iterated first two missions.
v63: Added Defensive Driving challenge map.
v64: Sniper scope sound. Basic cover points.
v65: London
v66: London improved
v67: Shotgun. Color grading.
v68: Auto-aim (can be toggled in Gameplay settings)
v69: Fixed some auto-aim bugs
"Wake up the Americans"
v53 (EXPERIMENAL) is now available with a new CHICAGO map and the ability to RECLOCK up to 10x faster. Press Q to increase speed while RECLOCKING.
Please be aware that this experimental build also has some known issues and bugs. Happy holidays and thanks everyone for your feedback!