Mercenaries has drawn a lot of comparisons to the Grand Theft Auto series, and rightfully so. This is like a military version of GTA where you fight against other soldiers and mercenaries, as opposed to cops and gang members. Lucasarts designed the game to take place on a wide open map, so you can explore all over the place. This kind of freedom is what makes this game so much fun, but you should know it can be very difficult at times. There are some areas you don’t want to wander into until you are ready.
There is a lot you can do in this game. You can set out on foot or commandeer a vehicle. You can even fly helicopters around, if you like. As you earn money for completing missions and capturing bad guys, you can buy more equipment and guns, plus call in air strikes and the like. It’s fun to get creative with planting C-4 explosives, because you can take down buildings with them. One thing I like to do is plant C-4 on a Jeep, then race towards a building and jump out at the last moment while I detonate the charge as soon as the Jeep hits the building. It’s a great way to take out rooftop snipers.