In order to get this achievement you have to do the following

Clear 25% or more of all game modes.

You can check your progress by selecting Game Progress from the main menu, and then mode record, you need to have cleared 25% of the modes listed. It also gives you information on how to complete each mode.

These are

Exhibition - Use 25% Of All Fighters, Use 43 different fighters
Title Mode - Win The Title With 25% Of All Fighters, Complete title mode with 43 fighters
Title Defense Mode - Complete 25% Of All Goals, Complete 53 goals whilst playing the mode
Tournament Mode - Complete a 4 man and a 6 man for 25%
Ultimate Fights Mode - Complete 25% Of The Ultimate Fights, Complete 3 fighters at 100%
Career Mode - Wins 25% Of All Divisions, Complete 2 different weight classes
Event Mode - Play Through 25% Of All Events, Load up 3 of the events from the UFC and fight each.
Tutorial Guide - Clear 25% Of All Tutorials, Complete the beginner tutorials

-M60