Here is the full list of all 30 Strider achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Complete game on Normal difficulty
Defeat Meio Prime
Defeat Grandmaster Meio
Defeat Resurrected Solo
Defeat Juroung
Defeat Mechapon
Destroy Gravitron 2
Defeat 20 enemies using Panther
Defeat the Armored Dragon Stage 2
Defeat Xi Wang Mu
Defeat General Mikiel
Destroy Gravitron
Defeat the Millipede
Defeat The Winds
Defeat 10 enemies using Reflect
Defeat Solo
Defeat Pei & Tong Pooh
Defeat Pei Pooh
Defeat the Armored Dragon
Charge the first Novo
Defeat 20 consecutive enemies, without being hit
Collect all Energy Upgrades
Collect all Fallen Striders
Collect all Health Upgrades
Collect all Kunai upgrades
Collect all Large Canisters
Complete the Balrog without falling
Complete the game in under 4 hours
Complete game on Hard difficulty
Max out the Hit Meter 25 times