You need to be online to play the game or you can be on a LAN as well. The game is single-player and has three levels of difficulty. In the player modes, you will be using the conquest game mode of the battlefield and all the similar maps as well. Note that single-player will allow you to play with up to 16 AI players but if you use the internet mode then you can play with up to 64 people.
UT2003 has received mostly disappointing reviews, because it did not have the impact that its 1999 predecessor had. One reason was increased competition, with Halo: Combat Evolved, Tribes 2, and Battlefield 1942. These games had raised the bar for the multiplayer first-person shooter gaming by including vehicles and more complex teamplay.
If you are new to FH, be sure your copy of BF1942 has the latest patch, which is available on this page. The client files are compressed as .rar or .zip archives, and you will need an appropriate utility to unpack them before installing. If you do not have one, you can get winrar 2b1af7f3a8