No! Our DMs are well-versed in multiple game systems, and eager to expand their knowledge further to run different games - most Tabletop Roleplaying Games are similar in nature, and therefore easy to adapt.
Some other fun RPGs we love running (but not limited to) are:
Call of Cthulhu
Vampire: The Masquerade
Blades in the Dark
If there's a system you're interested in learning, or having run by one of our DMs, please send us a message! We'd love to offer it.