Known Realities

This is the number of realities known by Homeline and Centrum. Italics are extrapolated from both Classic and 4e material.

Table of Known Realities

Designation	Q3	Q4	Q5	Q6/ Echos	Q7	Q8	Q9	Q10	Accessable	Total
Classic Homeline (2015)	25	87	68	377/ 281	102	~45	40	40	659	784
Classic Centrum (2015)	U	U	U	~410/ ~308	~100	46	40-50	40-50	~646	~646
4e Homeline (2027)	39	89	68	379/ 281	128	45	43	52	703	843
4e Centrum (2027)	U	U	U	379/ 281	~100	45	43-50	52	~619	~619
Described in sourcebooks	35	34	53	56	40	5	None	None	N/A	223

Echo Information

Until the discovery of Centrum Beta (apparently an Quantum 7 echo of Centrum), it was thought that only Homeline had echoes. Furthermore, it is theorized that some echoes "drift" into quantum range. Echoes range from 12000 BCE to present, a few before 3000 BCE, and 19 in the 17th century  Some echoes can shift to quantum when changes to their history occur while other echoes ("anchors") cannot be shifted. Anchor echoes are sometimes viewed as close parallels. Echoes that shift or are shown to be an anchor are usually given new names. It is unclear whether former echoes are included in this total.

Twenty-Four Echoes have "vanished" from Quantum 6. Four shifted to Quantum 5; eleven have moved to Quantum 7 (six of which were due to Centrum influence); one (Engstrom) shifted to Quantum 4 and seven have not been rediscovered. One reality was shifted to Quantum 7 by Centrum but was returned to Quantum 6 by isolated I-Cops.

Quick Reference Table

Alpha is a proto version of Homeline that also had actual time travel and a limited WWIII in 1992.

Event	23 Skidoo	Classic: Time Travel	Infinite Worlds
OTL Date	N/G	1991	2005
Parachronic/Sideskipping invented	1991	1994	1994
Invention Revealed	1999	1998	1998
Centrum learns of Homeline	N/A	2003	2015
Homeline learns of Centrum	N/A	2006	2018
Alpha/Homeline Present	2006	2015	2027
Centrum Present	N/A	2015	2027

Notes

1. Things have settled down to about 10 new realities discovered each year so Classic Homeline should have ~120 more timelines in its 2027 rather the ~59 4e Homeline does.
2. Q5 totals include Homeline (Classic: Time Travel p. 87; Basic Set 526)
3. Engstrom, formerly an echo from Q6, is not included in the above counts.
4. Quantum 6 numbers are total/Echos (B544)
5. Four Quantum 6 echoes have moved to Quantum 5. Two of these were due to Centrum efforts to move the reality closer to them but the calculations weren't correct.
6. Information about Quantum 7 and higher comes from captured Centrum agents.