Iris Pro 1024 capabilities

I just received a late model (2013) Macbook Pro w/ Retina 15"as a gift. Either due to confusion of my relative, or miscommunication via the salesman, I have a base model with only the Iris Pro 1024 graphics card. The only information I have been able to find on what it is capable of doing/being used for, is for video editing. As there is no other graphics card, I'd imagine any game play would problematic or am I wrong in thinking that? I am not familiar with this model of graphics card, and am new to Mac hardware and software. So what is the Iris Pro capable of doing and can I use Steam Play or older games on this unit?