Here is the full list of all 11 RedRaptor achievements.
Purchase 10 Upgrades.
Complete Stage 5 in Campaign Mode.
Purchase 5 Upgrades.
Purchase 4 Upgrades.
Purchase 3 Upgrades.
Purchase 2 Upgrades.
Purchase 1 Upgrade.
Complete Stage 4 in Campaign Mode.
Complete Stage 3 in Campaign Mode.
Complete Stage 2 in Campaign Mode.
Complete Stage 1 in Campaign Mode.