Bokor is a planet in Gun Bros 1. It is different from all the other planets because it does not have waves and revolutions. There are ten hordes of varying difficulty levels, each like a wave, but after you finish the tenth horde, you will keep going until you die.
The environment is like a ruined city, full of green liquids.
There is also a high score, based on the amount of enemies you kill. The enemies are different kinds of zombies, and they are all melee. Enemy XP levels and speed increase with each horde.
There is a glitch where if you stand on the top of the map, above the large rock, enemies will only spawn from above the rock. This way, if you have a powerful heavy weapon, it is easy to reach scores of hundreds of millions.