I TOTALLY understand the need to implement methods to ensure bots and other non human tactics are being used on the site. But lets be honest, captcha is AWFUL! I would like to suggest 2 awesome alternatives that work just as well, if not better than captcha.
I am not affiliated with either, I just think they are so much better and easier for users as well as for your site and the need to maintain security.
The alternatives are:
basically they are a version of captcha that do not require the user to figure out cryptic words/phrases. The user simply performs and action that only a human could do which achieves your objective but doesn't turn your visitors against you. Please check them out and consider them for cheathappens.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem