It's clear Mandalore likes his privacy, which is unfortunate for people seeking more of his stuff outside of his channel. (He's done tons of interviews, by the way. I recommend searching for Feat. MandaloreGaming on youtube).
Shammy's discord is on shammy's subreddit. /r/Shammy
https://discord.com/invite/GAB6WVx
Quick link for you.
BTW, I know this is old, but apparently Titan Quest is also on Android. And I heard it's a pretty good port (better than the console versions)