Here is the full list of all 22 ROCKMAN X DiVE achievements.
Stage Clear: Snow Base 13-6(Normal)
Stage Clear: Power Control Center 12-6(Normal)
Stage Clear: Oil Field 11-6(Normal)
Stage Clear: Volcano 10-6(Normal)
Discover 100 hidden deep element in stages.
Stage Clear: Area Forest 7-6(Normal)
Stage Clear: Floating Ruins 6-6(Normal)
Stage Clear: Sky 5-6(Normal)
Stage Clear: Air Force 4-6(Normal)
Stage Clear: Factory 3-6(Normal)
Stage Clear: Gallery 2-6(Normal)
Stage Clear: Highway 1-6(Normal)
Stage Clear: Cyberspace 9-6(normal)
Stage Clear: Military Train 8-6(Normal)
Complete a Co-op stage
Get S-rank in Race Mode (Challenge)
Get A-rank in Race Mode (Challenge)
Discover 1 hidden deep element in stages.
Play the game on Steam
Stage Clear: Bio Laboratory 14-6(Normal)
Stage Clear: Super-Electromagnetic Lab 15-6(Normal)
Win a Ranked Match