System in an Apocalyptic World

The world has been turned to ruins by four factions of monsters. The Green Land: Home to monsters that can bend nature. The Dry Land: The place were zombies have the power of decay. The Frost Land: Inhabited with creatures with frozen flesh and bones. And finally, The Nether Land: The home of abominations that can summon hellfire.

In these four lands - otherwise known as Ruin Continents - have 4 guards. Three wanders that guard the Chamber of Trails. Once one reaches the Chamber of Trails, they will face off against the boss of the Ruin Continent.

When all bosses of their respectful lands are beaten, the final boss will be summoned and brought to earth. When it is defeated the world shall go back to normal.

What do the hopeless occupants of this ruined world have to aid them to fend for themselves? A system known as Omega.

Before the apocalypse, people were warned about the outbreak. With the system and a Tower, which is a havan for monster of different levels, they were given time to prepare for this chaos.

Will Kris, a boy who was born just before the apocalypse, and his companions bring the world back to it's former glory?