From Exodus3000 Wiki

Within the game action you can upgrade your weapon, defense, intelligence, security and radar stats. Upgrading costs Mars Dollars. Each upgrade level costs more than the previous ( Note: for prices and levels click on the links of each stat). Upgrading can be done when your land on an outpost during the game, with the exception of the radar upgrade that can optionally be bought with real cash. ( Note: see Radar for prices)

Exodus3000
Statistics	Weapons | Defense | Intelligence | Security | Radar
In-game Elements	Dig | Cards | Missions
In-game Locations	Mars | Homestead | Abandoned Homesteads | Settlements | Outposts | Volcanoes | Ruins | Craters | Plains | Dunes
Rules and Regulations	Alliances | Basics | Cheating | Payouts | Purchases | Special Prizes | Referrals | Cards | Dig for Treasure
Official Website	Official site