The Geas 5.1 system is one designed for a huge number of character options with a simple Accelerant-inspired battle-language so that effects can be easily communicated to others.
It is based off earlier versions of the Geas system used in Colorado in the 2000s, and has been updated for a NERO-style weekend-long Event format.
To download a .pdf of the entire rulebook, visit DriveThruRPG.
Note that the .pdf does not include all the released Roles.
For the rules themselves, including all the Roles so far, check them out here.