Combat and Upgrades galore - Eat your heart out Starcraft
The plot of Warzone 2100 is essentially the aftermath of an end-of-the-world scenario involving nukes being launched all over the world.
You play as "The Project", survivors of the nuclear holocaust who fight for their survival against scrappy terrorist cells who turn out to be in league with the New Paradigm, an enemy organization.
The graphics of this game are impressive for it's time, and it appears to have aged well over the years. The particle systems such as the machine guns, rockets, and other weapons systems are incredible.
This game also has an amazing degree of customization, as you play through you unlock "artifacts" which hold new technologies that were apparently "lost" during the nuclear war. You can use these technologies to build just about any unit you can think of! Even now, I have not seen any game with this level of customization.
The play style is interesting as well, the artificial intelligence is well tuned and active. They seek out resources for their bases, and only attack when they have technology that will challenge your bases defenses. They also do interesting teamwork with other AI, nearby bases under attack will be aided by an ally's units until the threat has passed.
Last, the sound is fitting as well, the music and sounds of this game are nothing short of outstanding. It really gives you the feeling that you're battling an opponent in the post apocalyptic future!
In summary, it's a well aged game that retains it's playability even after all these years. This underdog of a game deserves more credibility than it received years ago.