Halo Wars, for the Xbox 360, will be gaining a game add-on pack within the next few weeks.

The new add-on pack is called "Strategic Options." The DLC will introduce three new gameplay modes to the console RTS (from a press release):

• "Keepaway Mode is the “Halo Wars” adaptation of Capture the Flag. Teams will battle it out to capture a free-roaming Forerunner Sentinel to score points before the other team. Capture three sentinels to claim victory.
• Tug of War Mode is all about having a stronger army than the opponent. Defeating enemies is essential, but success is determined by a combination of the army, buildings and resources left standing in the end.
• In Reinforcement Mode, all active battle units are provided in successive waves. Players must adapt their tactics and use the ever-changing set of units to outwit and outlast the enemy.

“Strategic Options” also adds four new Achievements worth a total of 100 points:

• “One and Done” (30 points): Score the winning point in a game of Keepaway against Legendary A.I.’s
• “Pull Hard, Pull Deep” (20 points): Win and never trail in a Tug of War game
• “Freak on a Streak” (20 points): Gain at least 15 population from a single wave in a Reinforcement game
• “Living Loving Bug” (30 points): Obtain a Scarab during a Reinforcement game"

The exact launch date and pricing for the DLC has not been pinned down yet.