Ragnarok Online

Ragnarok Online cheat codes: 
Cheat mode:
Enter one of the following commands in the chat window to activate
the corresponding feature.

/tip                    - Open today's tips
/h (help)               - Show other control keys
/w (who)                - Show number of players on same server
/where                  - Show current location
/nc                     - Auto attack enemies without [Ctrl] + click
/noctrl                 - Continue attacks; does not work on spells.
/ns                     - Auto heal enemies (undead) without holding [Shift]
/ex                     - Lists blocked personal messages
/ex [character name]    - Block personal messages from named players
/in [character name]    - Allow personal messages from named players
/inall                  - Allow personal messages from everyone
/exall                  - Block personal messages from everyone
/leave                  - Leave current party
/expel [character name] - Kick player from your created party
/savechat               - Save current chat dialogue
/camera On              - Turn camera focus on
/camera Off             - Turn camera focus off
/memo                   - Save warp point; only with Warp Portal skill
/fog                    - Toggle fog effects
/organize [party name]  - Create a party
/guild [guild name]     - Create a Guild; must have Emperium item
/gocp [guild name]      - Disband Guild that you created
/effect                 - Toggle skill and casting effects
/miss                   - Toggle red miss indicator

Reverse Heal skill:
Type /noshift in the chat window when facing undead opponents.
By using the Heal skill, you will be attacking them with it.
Note: Do not try this on enemies that are not undead, as it
will heal them. Hold [Shift] to heal yourself while in this state.

Type /ns in the chat window to enable reversing heal. With it,
you can use the heal skill to kill the undead type enemies.
Your in-game mouse pointer will now be a sword when you move
it over players. This may make it difficult to move around or run away.

Shortcut for continue attacks:
Type /nc in the chat window to enable attacks without having
to continuously click the mouse button.

Easy Stun:
Be a Swordman, and get Bash at level 10. Get Fatal Blow. Get
a blade with 4 slot and insert 4 Savage Babe card . Use Bash
on a monster and it will normally get stunned