Bukkit

The reference page for the Kills section of the plugin is hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/EntityType.html, and not the one given in the default config of the plugin.

Version 1.4 changelog:

• Added 3 new monitored actions: bed entered, max level and eggs thrown.

• Commands can now be set as rewards.

• Optional sound now played when a player receives his book.

• Option to change the plugin's in game icon (the shamrock).

• Killing mobs with projectiles now increases the Kills count.

• Better overall performance.

• Polished default configuration file.

• Other various changes and fixes.

Previous 1.3 changelog:

• Added in game and console command achievements.

• Added 3 new monitored actions: enchantments, trades with villagers and usage of anvils.

• Other small changes.

Please view the configuration page to implement these new achievement types.
Some users have asked to make donations for the plugin. I added a donation button on the main plugin's page, feel free to donate to support the plugin and future updates.