Pretty decent
The first thing I noticed about the game was the sensitive controls. Almost too sensitive. But in a way I'd rather over sensitive controls than unresponsive.
There's actually quite a lot of things you can do in the game. You can do the basic shooting, crouching, rolling and running but there are a lot of commands to give to teammates. You can make them go stealthy or have them burst in to a room with a full on assault. You can also command them to follow you or guard a specific area. There are a few other commands too.
The graphics aren't a great part of the game but they're not too bad. They look like PS1 graphics with some cheap texture effects and a whole lotta shine! But considering this is a very early PS2 game they're not as bad as they seem.
There is only one main mode and it is challenging in some places but generally straight forward and easy.
Overall I found it pretty fun to play but I have played better games.