纯粹/原始设定
该规范描述了后室的原始设定,这来自于第一次介绍这一设定的帖子,由于后室设定的大规模发展,所以新的文章通常不会同意这一设定,相较于相比于成千上万个不同体量和复杂程度的实体和楼层,坚持着这一原始设定的人,更喜欢从现实层面关注那些疯狂,恐怖和孤独。
- 这个设定只接受0层为后室,只此一层,这与没有层级的想法相吻合,而因为在起始贴中,并未提及实体这一概念,所以原始设定中也没有实体。
传统设定
这一设定为原始设定的简化版本,并且引入了多个层级这一概念来发展更多内容,于原始设定不通,实体在这一设定下可以存在,由于某些考虑(可能会使设定过于饱和或削弱恐怖感),所以不同意过于多的层级,这个设定给了人进入后室冒险的感觉,每个层级可以有更多的设定,描写或其他观点,后室的粉丝中有许多人遵循这一设定。
- 这个设定只承认三个楼层:0层 1层 2层,其他楼层并不被接受。
"The Main Nine" Canon
This refers to the mainly-believed Backrooms canon: The Main Nine. True to its name, this idea increases the number of confirmed levels up to 9. Most Backrooms fanbases subscribe to this canon (including this wiki!) because it offers a wider range of original levels that each have interesting ideas, but does not get out-of-hand with the number of levels. Each level, more or less, gets more dangerous and poses more of a threat as the number increases.
Unrestricted Canon
This canon, unlike the other beliefs, defines no bounds when it comes to "confirmed" levels; in the eyes of those who follow this belief, all levels are canonical. This is more common in newer followers of the Backrooms that do not mind having a free canon, including a portion of this wiki. While the quality of each level differs, considering them all as real can lead to a more extensive and interesting Backrooms lore.
- This canon considers every level as canonical.