Full list of all 12 R-Type Dimensions achievements worth 200 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Kill 30,000 enemies
Collect 500 power-ups
You are one with your plasma cannon and have killed 10 Bydo enemies with a single shot
Using only full beam shots and without dying, complete stage 1 of R-Type or R-Type II in 1P Classic
Using rapid-fire and no power-ups, complete stages 1 & 2 of R-Type in a single game of 1P Classic
You have completed R-Type and saved earth from the evil Bydo
You have completed stage 1 of R-Type and struck fear into the Bydo
Complete R-Type II
Find and destroy the 5 hidden spores on stage 4 of R-Type
Destroy every enemy and object in stages 1 & 2 of R-Type during co-op play
Kill one enemy of every kind in R-Type and R-Type II
Collectively tally 20 revivals in a single game of Classic Co-op