The game is an open-word TPS, with 3 characters, and 3 successful endings each. This game was the start of the short-lived Mercenaries franchise, and is set in North Korea. As each character has a unique ability suiting each playthrough, I believe that 3 playthroughs might be necessary..

One, with Jacobs, who is best with a standard military-style playthrough, supporting the South Koreans as he is fluent with Korean.

Another with Mui, who is proficient with covert and stealth-style tactics, aiding the Chinese as she is fluent in it and with the side-missions the Chinese give out are best suited for her style of gameplay.

and finally, one with Mattias, if a plain destruction-based playthrough with the Russian Mafia, as both are most compatible with his style.