There are five bundles for Ars Magica 5th edition (Bundle of Holding has smaller-sized bundles so whereas Humble Bundle might do these as one for say $30 and makeup for it in huge volume of purchases with BuH's smaller audience they have to break it up into five $25 bundles).

These are all revived bundles. Based on the published dates the product line is no longer in development and besides it seems complete (other than you can always have more adventure books).

Previously as each bundle came out separately there was no reason for me to buy them. Now everything is together and all 5E products are included.

Although a bit pricey it is $130 for $605 of product. Even at a big discount of 50% that's still getting everything at 57% discount over that so seems well worth it. Definitely buying this.

Ars Magica 5 ($28, $125 PDF retail value) originally Aug 2014 bundle

AG-205 Ars Magica 5E (2004)
AG-275 The Broken Covenant of Calebais (2004)
AG-277 Houses of Hermes: True Lineages (2005)
AG-280 Covenants (2006)
AG-281 Houses of Hermes: Mystery Cults (2006)
AG-285 Houses of Hermes: Societates (2007)
AG-286 The Lion and the Lily: The Normandy Tribunal (2007)
AG-291 Tales of Mythic Europe (2009)
AG-300 Apprentices (2012)
The Living Covenant: Freebies from Atlas Games (free)

ArM5 More Magic ($23, $105 PDF retail value) originally Mar 2016 bundle

AG-279 The Mysteries (2006)
AG-284 Ancient Magic (2007)
AG-289 Hedge Magic (2008)
AG-294 Rival Magic (2010)
AG-299 Hermetic Projects (2012)
AG-304 Tales of Power (2013)
AG-306 Transforming Mythic Europe (2013)

ArM5 Wizards and Power ($27, $125 PDF retail value) originally Aug 2017 bundle

AG-274 The Fallen Fane: An Ars Magica Live-Action Scenario (2004)
AG-276 Guardians of the Forests: The Rhine Tribunal (2005)
AG-278 Realms of Power: The Divine (2011)
AG-282 Realms of Power: The Infernal (2006)
AG-288 Realms of Power: Magic (2008)
AG-290 Realms of Power: Faerie (2009)
AG-295 The Sundered Eagle: The Theban Tribunal (2010)
AG-302 Against the Dark: The Transylvanian Tribunal (2012)
AG-308 Faith & Flame: The Provençal Tribunal (2014)

ArM5 Mythic Europe ($26, $120 PDF retail value) originally Jul 2018 bundle

AG-283 City and Guild (2006)
AG-287 Art & Academe (2008)
AG-292 Magic of Hermes (2009)
AG-293 Lords of Men (2010)
AG-296 The Church (2011)
AG-297 Legends of Hermes (2011)
AG-301 Grogs (2012)
AG-303 Antagonists (2013)

ArM5 World of Magic ($26, $130 PDF retail value) originally Jul 2019 bundle

AG-298 The Cradle & The Crescent (2011)
AG-305 The Contested Isle: The Hibernian Tribunal (2013)
AG-307 Hooks (2004)
AG-309 Mythic Locations (2014)
AG-310 Between Sand & Sea: Mythic Africa (2014)
AG-311 Through the Aegis: Developed Covenants (2015)
AG-312 Thrice-Told Tales (2015)
AG-313 Lands of the Nile (2015)
AG-314 Dies Irae (2016)