Here is the full list of all 34 Void Rangers achievements.
kill_ai_d
kill_kraken_d
kill_ray_d
kill_shield_d
die_by_ai_d
strong_armor_d
mega_armor_d
epic_armor_d
uber_armor_d
best_pistol_d
best_smg_d
best_shotgun_d
best_flamethrower_d
best_rocket_d
best_laser_d
best_boom_d
best_ray_d
best_lightning_d
best_doom_d
best_vortex_d
loot_hoarder_d
legendary_hunter_d
legendary_d
collector_d
rainbow_d
maxed_out_d
milionaire_d
money_machine_d
whale_d
killer_d
destroyer_d
eliminator_d
penta_kill_d
combo_master_d