With the Rumble Fighter OGPlanet Astro/CS Hacker v1.3, you'll be able to hack free astros or CS on both Rumble Fighter and Gem Fighter.
Download Link: http://rumblefighterhacks.com/astrohack/

Rumble Fighter OGPlanet Astro/CS Hacker Version 1.3 currently supports all countries. Simply enter your ogplanet/gemfighter username, select the server, and press begin. Select -Verified Account- only if your rumble fighter-gem fighter account is verified. As of June 11, 2013, the OGPlanet Astro/CS Hacker v1.3 is currently functioning and hacking astros/cs. So what are you waiting for? A free download link has been provided for a limited time, check it out now!
You should gain 200 Astros-2000 CS per use, use up to 5x a day, if you exceed the limits you may face a ban.

Download Link: http://rumblefighterhacks.com/astrohack/

How To Use
1. Download from one of the provided links.(Download: http://rumblefighterhacks.com/astrohack/)
2. Extract the contents to a secure folder
3. Launch the Rumble Fighter OGPlanet Astro/CS Hacker v1.3
4. Enter username, select server, and press "Begin"
5. Select "Verified Account" only if your rumble fighter/gem fighter account is verified. (No PW Required)
You should gain 200 Astros/2000 CS per use, use up to 5x a day, if you exceed the limits you may face a ban.

Astro/CS Hack Compatible With
Rumble Fighter
Gem Fighter
Zone 4
La Tale
Red Stone
All OGP Games
La Tale