How many test chambers are there in portal?
Why don’t you just play and find out? It’s a short game. <4 hours.
But if you must know: 19.
Portal 1 only have 19 chambers but in Portal 2 reveals new chambers about stuff not introduced to Chell in Portal 1. In Portal 2, some are just newly made by GLaDOS or Wheatley for Aperture Science.
Moved to the correct forum.
There are 19 actual test chambers in the campaign, but there are also the ‘behind-the-scenes’ levels and some bonus maps.