Recs.
Updated
This is a 3D MMORPG (also voted the #1 Cross Compatible MMORPG of 2016) and a 3D rendition of the classic AdventureQuest browser game (battleon.com). This can be played on MAC, PC, ANDROID, and IOS devices, available through either Steam or your built-in app store. Fight strong bosses, party up with your friends, run dungeons. You're on your phone, I'm on my computer, lets raid!
SpecsUpdate
Pros
Pro Play with friends on different operating systems
Instead of simply tweaking the game to work on mobile, in AdventureQuest 3D you can actually play with others on different operating systems - you can be on your phone, and your friend on a desktop computer while you both raid together.
Pro Fun writing style
The first character you meet in the open beta is Zorbak who sortof looks like an evil mouse. Some of the first dialogue you see goes like this:
[Zorbak] POP Quiz! What's worse than a zombie eating your entire family?
[You] WHAT!? Nothing is worse than that...
[Zorbak] Oh yes there is! Tutorials! I Freaking hate tutorials!!! You know...the kind that force you to click the things for like the entire first hour of game play. Spits. But - good news! I found the guy responsible for making THOSE kind of tutorials...meh heh...
[You] You did?
[Zorbak] Yup. Found him, and pushed him right into that undead army's path.
[You] what!?
[Zorbak] I know. I know. No need for thanks.