In the article  “Room Escape Artist: What are the definitions of each of the four generations of escape rooms?” which can be found here

Shawn Fischtein of Escape Games Canada

was quoted on what the 4 basic “generations” of escape games in the world right now were. Alot of people seem to have a problem with these definitions, but as a designer and builder of alot of escape rooms, I tend to follow them in my own descriptions. He is quoted from the article as saying:

“Gen 1

• Uses simple mechanical systems
• Relies heavily on player energy input to make anything “happen”
• Typically includes lock boxes with hasps and padlocks
• Contains simple systems like using a reaching pole or a fishing magnet to obtain new information or items
• Delivers information or clues mainly through visual representations (prints) or written language
• Frequently relies on an observer or an in-game actor to moderate gameplay

Gen 2

• Utilizes stored magnetic, electronic, kinetic potential (gas springs etc.) for much of the the game
• Puzzles start controlling clue deliverance through means of tripping electronic sensors
• Replaces lock boxes with spring-loaded or gravity potential release-triggered mechanisms
• Uses simple controllers (or “dumb” controllers) that aren’t processing any sort of logic
• Can include simple lighting systems and sound systems that adapt as the players progress through the room

Gen 3

• “Smart” room (as in, integrated technology)
• Utilizes actuation and more complex electronic controllers
• Room “knows” where the players are in their progress and can adapt, monitor, or guide the experience with more automation
• Replaces most padlocks or combination locks with interactive and intelligent computer based systems
• Some of the systems in these rooms may be integrated in chunks or clusters, which help the game masters create phases of the game

Gen 4

• Entirely automated rooms and doors
• Substantial “smart” and responsive systems
• Delivers clues and information through responsive systems that carefully monitor the progress of players and can adapt in order to keep a streamlined experience for everyone involved
• Most or all computers are integrated to maintain a seamless transition from one objective to the next
• Introduces complex gaming mechanics such as butterfly effects, strategy, and replay-ability”

I will personally continue to use these definitions when we design, build, and sell games.