Red Faction: Armageddon

After you leave the tunnels with Kara, you will come to an area where 8 different spawner pods must be killed. Follow the directional arrows to find them.
Only two enemies may cause problems here: The Tentacles, and there is also a Behemoth. To deal with the tentacles, stay far back with the assault rifle, using B to dodge if it throws any debris. As for the Behemoth, use any of your heavy weapons, aim for the head and roll away from its charges and gas throws.
Once all pods are destroyed head back to Winters. Now you must hold off attacking enemies in a L.E.O Exoskeleton. There is nothing tricky here, so once all enemies are dead, hold X to speak to Winters. Then the achievement will unlock.