Jerrath is described as 'online massively multiplayer game designed for it’s players by its players'. There are more than 10 games similar to Jerrath for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is Doom. It's not free, so if you're looking for a free alternative, you could try Runescape or Aion. Other Jerrath like games are Dead Space (Paid), The Mana World (Free, Open Source), Zandronum (Free, Open Source) and Wizard101 (Freemium).
Doom is a science fiction horror-themed first-person shooter video game in which players assume the role of a space marine, popularly known as "Doomguy", who must fight his way through the hordes of invading demons from Hell. Represent entire series of Doom games including Doom , Doom II: Hell on Earth, Final Doom, Doom 64, Doom 3, Doom (2016), Doom Eternal.
Runescape is the most popular free MMO in the world, by Jagex Games Studio. Complete quests and win enormous treasures in a 3D world full of magic and monsters- all while never leaving your internet browser.
Take flight as a winged warrior in the middle of a massive war in Aion, a stunning massively multiplayer online roleplaying game where abundant solo adventures, intriguing epic group quests, challenging dungeons, and massive Legion raids hone your battle skills as you ascend to...
The Mana World (TMW) is a serious effort to create an innovative free and open source MMORPG. TMW uses 2D graphics and aims to create a large and diverse interactive world. It is licensed under the GPL, making sure this game can't ever run away from you.