I've just added a Regal Realms expansion to Ironfell (indie, hex-tile, MMORTS). There are ten new units and two new Keep and Castle realms.
The new realms use a brand new 'Policed' permission type; they are PVP, but the creator of the realm is invincible. This gives players a safe place that can't be spoiled by anyone else.
"Whilst engaging the majority of Gimley's forces in battle, Zathor sent a few lone soldiers to assault the princess, sweeping aside the catapult's like nobody's business and transforming the princess into a pool of blood."
Check out the new units here: Ironfell.com