Freedom Force offers tactical combat as well as a deep character development system, and while it is essentially an isometric 3D role playing game (RPG), it doesn't really offer a quest driven story structure, nor does it provide much in the way of character interaction.
Freedom Force allows you to pause or slow down the game while issuing orders to your team, which gives you the kind of control you would expect from Bioware Infinity Engine games like Baldur's Gate II. It also offers a fully destructible environment, so an essential part of gameplay includes removing items like street lights or roof-top air conditioners, and throwing them at your enemies.
The single-player campaign is broken into missions, with the first several serving as both a tutorial and an introduction of the first four super heroes. After each mission, characters receive a certain number of experience points (XP), and you can using the XP to train them, which allows you to increase their powers and attributes.
You can also create your own super heroes, and when you have enough prestige, which is also given for successful missions, you can recruit them, or any of the heroes that are introduced throughout the campaign.