Here is the full list of all 49 Stardust Galaxy Warriors achievements.
Revive a fallen friend 10 times.
Kill another player with friendly fire.
Beat the campaign without buying anything from the Junk Merchant.
Beat the campaign without a player dying or being incapacitated.
Disassemble 5000 Mechanical enemies.
Play a game with a friend.
Beat a campaign level in multiplayer with only one player collecting powerups.
Destroy 5000 Generic enemies.
Use all available weapons.
Use all mech classes.
Get rid of 5000 Organic enemies.
Beat the campaign using only flamethrower as the primary weapon.
Sink 5000 Marine enemies.
Create a custom option preset.
Beat the Campaign game mode.
Do not enjoy the disco.
Beat Unstable Sun level in Campaign game mode.
Beat Scrapyard level in Campaign game mode.
Reach stage 25 in gauntlet mode using 'Normal' custom settings preset.
Reach stage 20 in gauntlet mode using 'Normal' custom settings preset.
Max out any single mech stat.
Beat Robot Factory level in Campaign game mode.
Spend a lot of money buying upgrades.
Beat Gas Giant Rings level in Campaign game mode.
Beat Alien Hive level in Campaign game mode.
Beat Abyssal Wreck level in Campaign mode.
Destroy the rock in Abyssal Wreck level.
Beat Water World level in Campaign mode.
Reach stage 15 in gauntlet mode using 'Normal' custom settings preset.
Reach stage 10 in gauntlet mode using 'Normal' custom settings preset.
Reach stage 5 in gauntlet mode using 'Normal' custom settings preset.
Play a game in challenge mode.
Play a game in gauntlet mode.
Buy an epic upgrade.
Reach stage 30 in Strike mode using "Normal" custom settings preset.
Reach stage 25 in Strike mode using "Normal" custom settings preset.
Reach stage 20 in Strike mode using "Normal" custom settings preset.
Reach stage 15 in Strike mode using "Normal" custom settings preset.
Reach stage 10 in Strike mode using "Normal" custom settings preset.
Reach stage 5 in Strike mode using "Normal" custom settings preset.
Beat Frozen Skies level in Campaign mode.
Beat Asteroid Field level in Campaign mode.
Beat a campaign level without taking health damage.
Launch the game.
Enjoy the disco.
Beat the campaign using only melee and abilities.
Beat a single player campaign using the 'Iron Man' preset and only Black Bear.
Get all post-level honorary titles.
Destroy an enemy with its own bullet.