What I enjoy most of Desert Siege is the Black Hawk Down feel due to the desert premise. The refinery tower mission is a particularly cool stage because of the impressive set design. There are lots of abandoned houses and infrastructure strewn around the levels, resulting in many winding paths full of ambush opportunities both for you and the enemy, so most of the adrenaline rush comes from the tactical surprise created from this aspect.
Another cool feature is the ability to unlock special characters called specialists with...ehem, special weapons. Lastly, because the gameplay is roughly that of the original, the short expansion works well in terms of filling up fans' excitement for a while, and for those new to the series, it doesn't hurt to try this right away after you've completed and enjoyed the first game.
KingLim
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