Here is the full list of all 35 MEGA MAN X DiVE Offline achievements.
Stage Clear: Deep Log 23-6(Normal)
Stage Clear: Reploid Air Force 22-6(Normal)
Stage Clear: The Host of Fate
Stage Clear: Ammunition Factory 20-6(Normal)
Stage Clear: The Pitiful Host
Stage Clear: Host of Annihilation
10 weapons acquired!
Stage Clear: Old Castle 17-6(Normal)
Discover 100 hidden deep element in stages.
Stage Clear: Den Area 16-6(Normal)
Stage Clear: Super-Electromagnetic Lab 15-6(Normal)
Stage Clear: Bio Laboratory 14-6(Normal)
Get S-rank in Race Mode
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)
10 characters acquired!
Stage Clear: Cyberspace 9-6(normal)
Stage Clear: Military Train 8-6(Normal)
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)
Discover 1 hidden deep element in stages.
Complete Level 10 (Normal) once
Complete Level 50 (Normal)
Complete Level 100 (Normal)
Complete Level 175 (Normal)
Discover 250 hidden deep element in stages.
120 characters acquired!
90 weapons acquired!