Cheat Codes for Tribes of the East.

kills all enemy creatures

Similar commands exist:
@Finish(0) -- victory for the attacking (left) side
@Finish(1) -- victory for the defending (right) side
@Break() -- immediate exit from the battle without any consequences

Added 2 minutes ago

I'd prefer something more interesting.

There are cheats for every taste, within reason, of course.

Added 10 hours 16 minutes ago
There is no such command as killall! And kill_all either!
There is kill_enemy, which summons riders of a certain faction (depending on the location), and they, rushing across the entire field, destroy all enemy units.