Sorted from easiest to hardest/longest.


When you create your character, enter these names:
Name: RAPTOR
Callsign: DOTEMU

Done.

In Bravo Sector, any difficulty, destroy a boat.
If you play on Elite, the boat will appear right on the first wave. If you play on lower difficulties, it will appear in later waves of Bravo Sector.

Finish ANY wave without taking a single hit into your main shields (on the right side).
You can either play like a boss and outmaneuver all enemies without getting hit, or you simply buy the Phase Shields. You can take as many hits into the Phase Shields as you want, the achievement will pop anyway.

Reach a boss without wasting a single ammo.
That means, none of your projectiles must exit the screen. Simply don't shoot ANYTHING until the boss appears, then the achievement will pop and you can shoot again. Any boss, any difficulty, and also any wave will work.

Clear the Bravo Sector on any difficulty.
You get this achievement by killing the final boss on Wave 9 of Bravo Sector. Doesn't matter how you kill it.

Reach the score of 300,000.
Don't worry about using money, the game counts even the money you spent, so if you keep on playing, the achievement will eventually pop. Playing on higher difficulties = more enemies = more money you can get.

Clear any wave on Elite difficulty.
I think this does not need further explaining.

Buy the Twin Laser.
It's the strongest weapon in the game and it costs 1,750,000$. If you play on Veteran or higher, you should be able to reach it by the time you complete Bravo Sector and Tango Sector. You can also farm Bravo Sector if you don't feel ready.

I don't recommend playing Outer Regions without Pulse Cannon or either of the laser weapons, because many of the final bosses are ground turrets.

For this achievement, you have to do multiple things during a single wave:
- Destroy every flying enemy.
- Destroy every ground enemy.
- Destroy every building that can be destroyed.
- Collect everything that can be collected (including those "stars" some enemies drop).
- No enemy or powerup can exit the lower part of the screen, or you won't get the achievement.
- Also, you have to do this using weapons other than THOR Auto-track Minigun and ODIN Laser Turret (the auto-aiming weapons). Apparently you can get it with any weapon.

First thing you have to do is to exit the game, go to Steam Library, right-click on Raptor 2015 edition, select Properties. Switch tab to Local Files and select Verify Game Integrity. The game should re-download one file. Now you can complete this achievement.

I recommend buying Pulse Cannon (RX1 Tsunami) for this one, as Pulse Cannon is very fast and powerful weapon and it attacks buildings too. I also recommend doing the achievement on Bravo Sector Wave 1 or 2 due to enemy and building numbers. Difficulty doesn't matter.

The achievement will not pop when you finish the wave, you need to go finish one extra wave, and the achievement will pop after you finish the next wave. The next wave doesn't have to be perfect.

For this achievement, you have to complete the game on Elite difficulty.
Specifically, killing the final bosses of Bravo, Tango and Outer Regions on Elite difficulty.

Note: apparently selecting autopilot does not work, so either it's bugged, or you have to select 9 times Bravo Sector, then 9 times Tango Sector then 9 times Outer Regions, however stupid that is...