From the box cover:
They've declared war. Now it's your turn to fight back! Experience the ultimate in futuristic squad level combat! In this sequel to the immensely popular Breach 2, you are the Squad Leader of an elite marine corps battling hostile aliens, hunter-killer robots and enemy marauders. Your marines rely on your courage and insight to direct their missions. From rescue-and-support to seek-and-destroy, it's up to you to get the job done. Each marine has a unique personality that determines how far he'll really go for you, so give your orders carefully!
Whether you are an old hand or completely new to the series, Breach 3 is easy to play yet challenging to master. New state-of-the-art features include a control system that combines the best of turn-based and real-time gaming, letting you stop automatically at crucial events. When a marine confronts an enemy, you can take the time to assess, plan and give orders at your leisure. Both sides move and fire at once, adding suspense and realism.
Of course the best elements of Breach 2 remain: the scenario builder and the flexibility to play either short missions or longer campaigns. Combine these with new features like tree-structured campaigns and a campaign builder, and Breach 3 sets new standards in playability!
Speech and great sound effects
Extremely user-friendly control system
Powerful mission builder and campaign builder
Exceptional artificial intelligence
Choose from 34 types of weapons and equipment
16 different opponents
Wide variety of terrain
Up to 5 levels of missions
Spectacular 3-D rendered animations
NOTE: Breach 3 can interconnect with Rules of Engagement 2. Experience gained in both games is transferred to your character's service record, and squad leaders and fleet commanders from previous games can be carried over.