Here is the full list of all 62 Nexomon achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Collect all monsters! A true master!
Capture 300 wild Nexomon.
Capture 240 wild Nexomon.
Capture the legendary warden of wind Hexia!
Capture the legendary warden of plant Tikala!
Capture the legendary warden of water Darine!
Capture the legendary warden of thunder Krowr!
Capture the legendary warden of mineral Titan!
Capture the legendary warden of fire Ogoon!
Own a reborn Nexomon and reach level 99+.
Capture the legendary plant Nexomon Nara!
Capture the ultimate Nexomon Omnicron!
Capture the legendary mystery Metta!
Capture the legendary water Nexomon Arqua!
Capture the legendary Mineral Nexomon Grunda!
Capture the legendary electric Nexomon Luxa!
Capture the legendary wind Nexomon Ventra!
Capture 180 wild Nexomon.
Capture the legendary fire Nexomon Fona!
Collect all 41 Nexomon fragments and get the radar!
Own a reborn Nexomon and reach level 60+.
Defeat Omnicron (again) and save the world (again)! Congratulations!
Defeat the warden of wind Hexia!
Defeat the warden of thunder Krowr!
Own a reborn Nexomon and reach level 30+.
Defeat the warden of fire Ogoon!
Defeat the warden of Mineral Titan!
Defeat the warden of water Darine!
OWN A NEXOMON LEVEL 99+.
Enter the mysterious Netherworld and complete your mission!
Battle Omnicron and become the new Nexolord!
Defeat Omnicron, the ultimate battle!
Defeat Zetta, the raging thunder.
Defeat Fenrir, the embodiment of pride.
OWN A NEXOMON LEVEL 60+.
Defeat Glacia, the jealous Overseer who won't let it go...
Defeat ALL tamers in battle around the world!
Defeat Grunda, the underground beast.
Capture 120 wild Nexomon.
Defeat Merida, the terror of the ocean!
Defeat 20 tamers in battle around the world!
Wasn't it obvious?
Defeat Merida in a volleyball match! Easiest win ever!
Defeat Hilda, the master of the paranormal.
Win 500 battles in your adventure!
OWN A NEXOMON LEVEL 30+.
Defeat Nadine, the sky menace.
Defeat Ira, the rocking Overseer of Fire!
Capture 60 wild Nexomon.
Win 400 battles in your adventure!
Defeat 10 tamers in battle around the world!
Defeat Remus, a man who knows no fear!
Win 300 battles in your adventure!
Capture 30 wild Nexomon.
Win 200 battles in your adventure!
Win 100 battles in your adventure!
Defeat Ivan, the Overseer! That's hardly an achievement, though.
Capture 10 wild Nexomon.
Win your first tamer battle!
Catch your very first Nexomon!
Beat a minion in your first real Nexomon battle!
Get your very first Nexomon! Now go and save the world, champ!