Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Nasty Surprise	Complete A Nasty Surprise mission on Medium difficulty.
Achilles Heel	Complete the TRO Achilles Heel mission on Medium difficulty.
An Unexpected Connection	Complete the An Unexpected Connection mission on Medium difficulty.
Behind Enemy Lines	Complete the Behind Enemy Lines mission on Medium difficulty.
Blitzkrieg	Complete the TRO Blitzkrieg mission on Medium difficulty.
Bring it Home	Complete the Bring it Home mission on Medium difficulty.
Clear the Path	Complete the Clear the Path mission on Medium difficulty.
Close Target Wrecky	Complete the TRO Close Target Wrecky mission on Medium difficulty.
Controlling the High Ground	Complete the Controlling the High Ground mission on Medium difficulty.
Decorated Combat Commander (secret)	Complete all missions on Very Hard difficulty. (Secret)
Dire Straits	Complete the TRO Dire Straits mission on Medium difficulty.
Eagle's Nest 1	Complete the Eagle's Nest 1 mission on Medium difficulty.
Escape from Mars	Complete the Escape from Mars mission on Medium difficulty.
Flying Solo	Complete the Flying Solo mission on Medium difficulty.
From Out of Nowhere	Complete the TRO mission From Out of Nowhere on Medium difficulty.
Frustrate Their Knavish Tricks	Complete the TRO Meanwhile, Frustrate Their Knavish Tricks mission on Medium difficulty.
Grand Theft Portal	Complete the TRO Grand Theft Portal mission on Medium difficulty.
Hidden Enemy	Complete the TRO Hidden Enemy mission on Medium difficulty.
Hook, Line, and Sinker	Complete the TRO Hook, Line, and Sinker mission on Medium difficulty.
IO's Bridge	Complete the IO's Bridge mission on Medium difficulty.
Leave Home	Complete the TRO Leave Home mission on Medium difficulty.
Lifeline	Complete the TRO Lifeline mission on Medium difficulty.
Light Up and Let Go	Complete the TRO Light Up and Let Go mission on Medium difficulty.
Meanwhile, Back at the Ranch...	Complete the TRO Meanwhile, Back at the Ranch... mission on Medium difficulty.
New Kids on the Block	Complete the TRO New Kids on the Block mission on Medium difficulty.
Out There Somewhere	Complete the TRO Out There Somewhere mission on Medium difficulty.
Precious Cargo	Complete the Precious Cargo mission on Medium difficulty.
Protection	Complete the TRO Protection mission on Medium difficulty.
Punishing the Black Dogs	Complete the Punishing the Black Dogs mission on Medium difficulty.
Reclaim our Base	Complete the Reclaim our Base mission on Medium difficulty.
Red Arrival	Complete the Red Arrival mission on Medium difficulty.
Rescue Me	Complete the TRO mission Rescue Me on Medium difficulty.
Spilt Milk	Complete the TRO Spilt Milk mission on Medium difficulty.
Stranded	Complete the TRO Stranded mission on Medium difficulty.
Strike at	Complete the Strike at the Heart mission on Medium difficulty.
Tapping the Core	Complete the Tapping the Core mission on Medium difficulty.
Terra Incognita	Complete the TRO Terra Incognita mission on Medium difficulty.
The	Complete The Three Beacons mission on Medium difficulty.
The Best Laid Plans	Complete the TRO The Best Laid Plans mission on Medium difficulty.
The Enemy Within	Complete the TRO The Enemy Within mission on Medium difficulty.
The Evil Battalion	Complete The Evil Battalion mission on Medium difficulty.
The Golem Ambush	Complete The Golem Ambush mission on Medium difficulty.
The Playground	Complete the 4 Combat Exercises to unlock The Playground.
The Race is On	Complete The Race is On mission on Medium difficulty.
The Relic Discovered	Complete The Relic Discovered mission on Medium difficulty.
The Ultimate Quake	Complete The Ultimate Quake mission on Medium difficulty.
Total Destruction	Complete the Total Destruction mission on Medium difficulty.
United We Fight - United We Die	Complete the United We Fight - United We Die mission on Medium difficulty.
Wolf in Sheep's Clothing	Complete the TRO Wolf in Sheep's Clothing mission on Medium difficulty.
Wrangling the Fleeing Herd	Complete the Wrangling the Fleeing Herd mission on Medium difficulty.