Wyvern (Dungeons & Dragons) aggressive, and able to lash with a sting-equipped tail. This edition of the "D&D" game included its own version of the wyvern, in the "Dungeons & Dragons Expert Set" (1981 & 1983). The wyvern was also later featured in the "Dungeons & Dragons Game" set (1991), the "Dungeons & Dragons Rules Cyclopedia" (1991), and the "Classic Dungeons & Dragons Game" set (1994). The wyvern appears first in the "Monstrous Compendium" Volume One (1989), and are reprinted in the "Monstrous Manual" (1993). The Mercykiller wyrm, a relative of the wyvern for the Planescape campaign setting, appeared in "In the Cage: A
Wyvern (video game) Yegge stated that he was working on rebooting Wyvern, although there were legal issues in the process of doing so. In April 2013, Yegge, having received clearance from Google to use Wyvern as a side project, announced his vision of a cloud-based Wyvern initially to be brought back on a mobile platform. In December 2016, Wyvern was re-released as an iOS game, with Yegge as the sole owner of the game after two years of negotiation with Wyvern's original owners. Now Wyvern is available for public play on iOS Appstore and Google Play. A PC version is in work. Wyvern