Hostile Environments! Take your warfare to a whole new level of excitement! Deploy under cover of exotic weather and severe planetary conditions. Surprise your enemy with your mastery of new battlefield tactics - from artillery to command-level commas to minefields! a daring commander can take advantage of any or all of these... if he's brave enough to seize the moment! Tactical Operations: Advanced Rules is the one-source reference for advanced rules that apply to on-world operations. It includes new movement and combat options.