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