Here is the full list of all 30 Strider achievements worth 400 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Collected all Large Canisters
Collected all Fallen Striders
Collected all Kunai Upgrades
Collected all Energy Upgrades
Collected all Health Upgrades
Completed game on Normal difficulty
Defeated Meio Prime
Defeated Grandmaster Meio
Defeated 20 enemies using Panther
Defeated Resurrected Solo
Maxed out the Hit Meter 25 times
Completed the Balrog without falling
Defeated Juroung
Defeated Mechapon
Destroyed Gravitron 2
Defeated the Armored Dragon Stage 2
Defeated Xi Wang Mu
Defeated General Mikiel
Destroyed Gravitron
Defeated the Millipede
Defeated 20 consecutive enemies, without being hit
Defeated The Winds
Defeated 10 enemies using Reflect
Defeated Solo
Defeated Pei & Nang Pooh
Defeated Pei Pooh
Defeated the Armored Dragon
Charged the first Novo
Complete the game in under 4 hours
Complete game on Hard difficulty