There is no guide for this game yet. But apparently it is EASY POINTS!

Baroness - 25 points

Defeat Baroness (P1 only)

Destro - 25 points

Defeat Destro (P1 only)

Firefly - 25 points

Defeat Firefly (P1 only)

Storm Shattered - 25 points

Defeat Storm Shadow in all three secret arenas (P1 only)

Strike Commander - 50 points

Defeat every wave in all Satellite Strike mini-games (P1 only)

Strike Lieutenant - 25 points

Defeat every wave in one Satellite Strike mini-game (P1 only)

Battle Master - 75 points

Collect and spend all 130 possible Battle Points (P1 only)

Hack 'n Slash - 20 points

Finish a level using only melee attacks on ground troops (P1 only)

Sloppy Joe - 10 points

Achieve the worst rank on a level without going Man Down (P1 only)

Man Up - 20 points

Complete a Jungle or Tundra mission without going Man Down (P1 only)

No "I" in Team - 20 points

Complete mission with higher than 50% Dual Targeting kills (P1 only)

Half the Battle - 10 points

Collect 50% of all File Cards (P1 only)

File-o-phile - 35 points

Collect all File Cards (P1 only)

Classified - 25 points

Collect all Intel Cards (P1 only)

Lost & Found - 25 points

Collect all G.I. JOE Contacts (P1 only)

Triplets - 25 points

Pick up all three types of Point Multipliers in one mission (P1 only)

Arctic Completed - 50 points

Complete all Arctic missions (P1 only)

Desert Completed - 50 points

Complete all Desert missions (P1 only)

Jungle Completed - 50 points

Complete all Jungle missions (P1 only)

M.A.S.S. Destruction - 50 points

Destroy the M.A.S.S. Device (P1 only)

Yo Joe! - 10 points

Purchase two G.I. JOE contacts (P1 only)

All G.I. JOE Contacts - 50 points

Purchase all G.I. JOE contacts (P1 only)

Combat Rock - 10 points

Complete a mission using only Combat class characters (P1 only)

Go Commando - 10 points

Complete a mission using only Commando class characters (P1 only)

Bevvy o' Heavy - 10 points

Complete a mission using only Heavy class characters (P1 only)

Girls Night Out - 10 points

Complete any mission using female characters only (P1 only)

Gimme The Keys - 10 points

Drive every G.I. JOE vehicle in the game (P1 only)

Code Cracker - 10 points

Gain access to a Combat Soldier Class Ability door (P1 only)

Nimble Access - 10 points

Gain access to a Commando Class Ability door (P1 only)

Lost Keys - 10 points

Gain access to a Heavy Class Ability door (P1 only)

Turret Syndrome - 20 points

Operate the turret in every vehicle in the game (P1 only)

Double Barrel Roll - 10 points

Perform 10 barrel rolls in unison in any level in co-op (P1 only)

Hardcore G.I. JOE - 50 points

Complete every Mission on Hardcore Difficulty (P1 only)

Higher Score - 10 points

Replay a mission and earn a higher score (P1 only)

Launch Money - 10 points

Launch 50 enemies into the air and kill them (P1 only)

Acceleration Celebration - 10 points

Activate the Accelerator Suit three times in any mission (P1 only)

Accomplished Mission - 25 points

Gain the highest Mission Ranking (P1 only)

It Takes Two - 10 points

Complete any mission in 2 player co-op (P1 only)

Secret Achievements

COBRAAAA!!! - 25 points

Purchase all COBRA characters (P1 only)

Arishikage Attack - 10 points

Complete any mission using Snake Eyes and Storm Shadow (P1 only)

Lovers' Quarrel - 10 points

Complete any mission using Baroness and Duke (P1 only)

The Tables Have Turned - 10 points

Complete any Artic, Desert, or Jungle mission using any COBRA character (P1 only)

Side Mission Completist - 20 points

Complete all Sub-operation Missions (P1 only)