In any case, if you have missed the "gimme" achievements, there's unfortunately no way to re-trigger them short of loading up a game save before the trigger and playing until it unlocks or playing through the game again.
When a player controls that resource, the entire team benefits.
Controlling flags also generates war points which are added to your team's war score.
When enough war points are collected, new upgrades in the team's Citadel become available for purchase.
I've been playing Darksiders over Steam, and decided to check on my achievement progress.
Like a strategy game, players have strategic objectives in each arena that, when captured, provide resources that give access to better units and some Demigods have the ability to summon their own minions that they can individually control.