At this very moment, Medal of Honor Pacific Assault is available for free at Origin. It's part of the "On the house" promotion that gives everyone a free game, but you have to use your Origin account to claim it to get it. However, after claiming it to your account, it will be available to download and play forever.
If you want the free game, head over to the Origin "On the house" campaign by clicking here, and log in to get the game.
Medal of Honor Pacific Assault is almost 13 years old now, but it is still a good shooter that is better than most new Call of Duty, Battlefield or Medal of Honor games in my opinion. It's also not a big loss if you don't like it, seeing as it's completely free at the moment.