For this part you have new mechs and weapons at your disposal. Gameplay is mostly limited to the mouse. However, you can use the keyboard for commands like attacking and defending. When you tell your person to attack an enemy, their just stand their and attack. Their is also a mission editor that allows you to creat your own missions which is very cool indeed.
Graphics are great.
You can also zoom in and zoom out to get a better look and the fight. The cutscenes are very good except for the ending scene for the Exapnsion missions. Sound is very good. Your can hear your mechwarriors talking, hear mechs fall, and hear things fall apart and land on the ground.