From publisher blurb:
The Code of the Warrior presents remastered species, classes, and rules for the Center Space. It is meant to update everything to be in line with all the changes in the Lifeshapers and Psychic Handbook series of expansions for the Center Space.
The book uses 3.x edition rules, so there is plenty to hack and steal for your own 3.x games even if you don't play Center Space.
Code of the Warrior includes...
The Soldier class: Soldiers choose one of seven weapon techniques: Big guns, automatic weapons, heavy melee weapons, sniper, grenades, shields, and gunslinger.
The Survivalist class (a remastered version of the Stalker): Survivalists choose one of three specializations: Hunter, Juggernaut, and Beast tamer.
Four updated races: the Andaki, Eera, Dijat, and Vharaga
New equipment (reprinted from the Savant expansion): new and updated weapons, armor, and cybernetics
Expanded, revised, and compiled feats, skills, and other rules
New and updated prestige classes: Andaki Raider, Eera Hunter, Revolutionary Guard, Vharaga Elite, and the Guijor