Godly.
-You are a mechwarrior. Recruit your team. Buy mechs. Customize and outfit them from the ground up with the credits you've earned. Use your skills as a trained pilot to unleash as much as 200 tons of pure firepower and metal, converging at upwards of 160kph on the enemy. Can you say underrated?
-The immersion factor is what makes it so much fun. For example, from the very moment your mech powers on you hear a computerized voice informing you of the ambient temperature and system status. Your hud also realistically lights up and comes to life. You get a variety of built in controls such as night vision, infrared, satellite linkups, the ability to eject your ammo or yourself, self-destruct, configuring your weapon firing order, issuing commands to teammates, setting redezvous points, and managing heat levels with a system shutdown command. Not to mention that using a joystick only adds to the realism of the experience. What year was this game made again?
-The volume, variety, and challenge of missions will keep you busy for a long time. It's a tough game, you really have to know what you're doing or you'll get your mechs blown to bits and then go broke.
-Customization of your mech is utterly amazing, you can outfit it with all kinds of weapons that all have varying ranges and intensities: lasers, particle projectile cannons (PPCs), missles, gauss rifles, miniguns, flamethrowers, autocannons. This doesn't even glaze over the equipment like jump jets either.
-The backstory and voice acting is fantastic.
-The graphics, while they may not hold up today, were ungodly back in the 90s. You practically had to invest in a new computer just to run this beast.
-The music fits the gameplay perfectly with beats that make your heart rate go up during crucial battles, and the sound is probably even better, everything from the crackling of a long range laser to the heavy grinding and pounding of your mech's enormous footsteps.
Bad:
-The terrain looks a little sparse compared to the detail on mechs, vehicles, and buildings.
-If you don't own a joystick and don't care to buy one, the mouse controls just don't do this game justice.
-Activision is seriously blowing it by not doing everything they can to continue on with this series of amazing games, and it's a shame that most players will have never experienced it.