Could you please give more explanation?
Also if you reference another game like "point blank" could you add a link to a video or screenshot of the game explaining which part you mean?
It would also be helpfull to know how you have your events set up thus far to be able to help you in regards to achieving the effect you want in your case, because different setups often require different solutions..
Without any of these questions above answered my answer would be:
Use a variable and set it to the number/name you want and add actions to your player depending on the name/number of the variable..
Regarding combo's it would probably be time/animation related when a combo is possible, so add conditions for that..