Masked Shooters 2

You can't use bots to get the achievements so...

Firstly, you will need to run 2 copies of the game for the Bombtastic achievement and at least 1 copy for the rest of the achievements.

To do this you simply need to start the game through steam (the one you will play for achievements), then right click on the game in your steam library and click properties. Click on the sub menu LOCAL FILES and then on BROWSE LOCAL FILES... .

Now start 2 copies of the .exe called MaskedShooters2 or however many copies you want to finish the achievements. (you only need 2 for Bombtastic achievement, you can do the rest with 1 but it is faster with more).

Now that you've got your copies, make an online game with the main copy that you started through Steam. Once the game is online then join it with your other 2 copies and join the game.

You will just have to achieve each achivements by following their descriptions !