Agni Prime here. I started down a trygon hole, and ended up with a visual history of the Tyranid Codex. Pretty interesting stuff to know how long this has been around. 18 years in the making, and what a way it's come.
|Tyranid Codex 5th Edition (2010)||Tyranid Codex 4th Edition (2005)||Tyranid Codex 3rd Edition (2001)|
|Tyranid Codex 2nd Edition (1995)||Tyranid Codex 1st Edition (1992)||First Appearance - Space Hulk (1989)|
If anyone else interested in more info on their specific codex, here's my point of reference:
Edit: Here is a much better point of reference: