These achievements are associated with the uprising Firefrost. There are 500 legacy points spread between 19 achievements in 4 subsections and 1 unobtainable achievement. All of the achievements can be completed in 3 runs of the uprising, one in each difficulty.
10 Legacy Points | 10 Legacy Points | 10 Legacy Points | 10 Legacy Points
These achievements are unlocked for defeating Refactored Battle Droid, Forgemaster Droub, for progressing to the ice tunnels, and progressing past the two power generators each once in [STORY] difficulty. The activity needed to complete these is;
[STORY] Uprising: Firefrost
10 Legacy Points
This achievement is unlocked for completing uprising Firefrost once in [STORY] difficulty. The enemies needed to complete this are;
Destroy the Generators | Forgemaster Droub | Invade the Base | Refactored Battle Droid
20 Legacy Points | 20 Legacy Points | 20 Legacy Points | 20 Legacy Points
These achievements are unlocked for defeating Refactored Battle Droid, Forgemaster Droub, for progressing to the ice tunnels, and progressing past the two power generators each once in [VETERAN] difficulty. The activity needed to complete these is;
[VETERAN] Uprising: Firefrost
20 Legacy Points
This achievement is unlocked for completing uprising Firefrost once in [VETERAN] difficulty. The enemies needed to complete this are;
Destroy the Generators | Forgemaster Droub | Invade the Base | Refactored Battle Droid
20 Legacy Points | 20 Legacy Points | 20 Legacy Points | 20 Legacy Points
These achievements are unlocked for defeating Refactored Battle Droid, Forgemaster Droub, for progressing to the ice tunnels, and progressing past the two power generators each once in [MASTER] difficulty. The activity needed to complete these is;
[MASTER] Uprising: Firefrost
50 Legacy Points
This achievement is unlocked for completing uprising Firefrost once in [MASTER] difficulty. The enemies needed to complete this are;
Destroy the Generators | Forgemaster Droub | Invade the Base | Refactored Battle Droid
100 Legacy Points
This achievement is unlocked for completing uprising Firefrost once in [MASTER] difficulty without dying. It seems that the legacy points and achievement are not accessible at this time. The activity needed to complete this is;
[MASTER] Uprising: Firefrost
50 Legacy Points
This achievement is unlocked for killing 1,000 enemy combatants in any difficulty. Although it requires a high number of deaths, this is easily completed in 3 runs, one on each difficult level. The enemies needed to complete this are;
Autonomous Walker JS-MW1 | Forgemaster Droub | Reclaimed Assault Droid | Refactored Battle Droid
Refurbished Burrower Droid | Turret | White Maw Blaster | White Maw Bruiser | White Maw Foreman
White Map Sapper | White Maw Thug
50 Legacy Points
This achievement is unlocked for killing 100 enemies while under the effects of a Combat Clarity adrenal acquired from Destroyable Crates. Note you don't have to use the ability with no cooldown to gain the effect. The best way to earn kills with this is to use an AOE ability while under the effects of the adrenal. The activities needed to complete this are;
[STORY] Uprising: Firefrost | [VETERAN] Uprising: Firefrost | [MASTER] Uprising: Firefrost
50 Legacy Points
This achievement is unlocked for killing 100 enemies with the Thermal Devastator acquired from Destroyable Crates. The activities needed to complete this are;
[STORY] Uprising: Firefrost | [VETERAN] Uprising: Firefrost | [MASTER] Uprising: Firefrost
50 Legacy Points
This achievement is unlocked for killing 100 enemies with the Tempest Rocket Launcher acquired from Destroyable Crates. The activities needed to complete this are;
[STORY] Uprising: Firefrost | [VETERAN] Uprising: Firefrost | [MASTER] Uprising: Firefrost