Here is the full list of all 20 Attack Of The Retro Bots achievements.
Complete 10 Sectors.
Complete 5 Sectors.
Complete 20 Sectors.
Complete 50 Sectors.
Complete 100 Sectors.
Kill 100 Retro Bots.
Kill 200 Retro Bots.
Kill 500 Retro Bots.
Kill 1000 Retro Bots.
Kill 2000 Retro Bots.
Kill 5000 Retro Bots.
Kill 10000 Retro Bots.
Kill 20000 Retro Bots.
Kill 50000 Retro Bots.
Kill 100000 Retro Bots.
Get 1 Hardcore x 20 Multiplier.
Get 2 Hardcore x 20 Multiplier.
Get 3 Hardcore x 20 Multiplier.
Get 4 Hardcore x 20 Multiplier.
Get 5 Hardcore x 20 Multiplier.