Marcus Herbert has just posted new mips3/mips4 builds of BzFlag for IRIX.
The official BzFlag website describes this release best:
1.7g0 "Holy Dancing Monkeys" released! Buy now and get two for the price of one! world file caching, team killers die, tank labels on roaming, new GUI options including a smaller display for slow systems (set opacity all the way up), and much more!