A game with different missions that will leave you glued to your monitor screen for hours if not days on end.
One, there are so many Mechs to choose from, you'll end up having not just one favorite but several if not all. My all-time favorite Mech is the Catapult (and it has been since MW2 Mercenaries), but I also like the Timber Wolf, the Timber Wolf Assault, the Stormcrow, the Kit Fox, and the Fafnir. I guess Clan Mechs are more popular than the Inner Sphere are. Second, throughout MW4, more weapons have been introduced as a new game was produced. In Mercenaries, weapons like the Heavy Gauss Rifle do make battles a little bit more unpredictable and interesting. Another benefit is the fact you can choose whatever weapons you want on this walking tanks and create variants, while the only thing you have to worry about is weight tonnage. The only drawback I find about the weapons in MW4 is that they take too long to be usable again when apprehended afterward. In MW2, even a Large Laser would recycle as fast as a Large Pulse Laser in MW4 would. Third, I find the missions in MW4 Mercenaries quite enjoyable and addicting. I think what they should introduce in the future Mechwarrior games are some more of those competition-type missions where you battle it out with computer players and you have to be the last one standing to win. I believe those kind of missions are what helped this game to be the best one in all of MW4. Other than that, I do love the mission where a huge army on both sides are involved in an everlasting, bloody battle. The missions in MW4 Mercenaries, Revolution and Overlord, are good examples. Lastly, and this is the most interesting part about MW4 Mercenaries. A couple of years ago, MekTek created a MekPak which introduced dozens of new Mechs and weapons into MW4 Mercenaries. No new missions, though. I honor their hard diligence to create all those Mechs, and to create a completely new world for us Mechwarrior fans.