Crysis

Secondary Objectives are identified as YELLOW on the mini-map as oppose to the main objectives which are GREEN. You'll usually get about one secondary for most main objectives. You can accomplish this achievement by the second part of the 1st act no problems. They just entail mostly eliminating a few more enemies and downloading some intel from a computer.

All objectives are easy to locate and can be done while playing through the story. Secondary objectives are only at Act I and II.

There are 10 secondary objectives.

List of secondary objectives:

-Contact- (2 objectives)
1. Disable the GPS Jamming Device.
2. Investigate North Korean Command Post.

-Recovery- (1 objective)
1. Access the Tactical Network.

-Relic- (1 objective)
1. Disable North Korean GPS jamming station.

-Assault- (1 objective)
1. Gather Intel from KPA

-Onslaught- (4 objectives)
1. Destroy the boxcar.
2. Destroy the Anti Aircraft Artillery (there are 3 of them)
3. Call an Airstrike for the munition dump. (avaiable after you destroyed the 3 AAA's)
4. Pick up the Gauss Rifle (after you destroyed the munition dump)

-Awakening- (1 objective)
1. Infiltrate office and retrieve intelligence data.

Please give feedback if I should do something better or if I missed one.