Arena-Based

As a contestant in the deadly game of The Culling, you must explore, scavenge items, craft weapons, and build traps that will enable you to slay your fellow contestants and emerge victorious before the end of the round. Only with cunning, skill, and a little luck will you be able to prevail and survive the match.

Unlike add-on modes in open-world survival games, The Culling redefines the battle royale genre by providing a tightly focused stand-alone experience that delivers incredible thrills and endless story-worthy moments.

Z1 Battle Royale, previously known as H1Z1, is a fast-paced shooter in which players compete in large-scale chaotic PvP spectacles of skill, wit and a little luck, where everyone must fight to the death to stand alone at the top of the podium.

Paladins is a First Person Shooter game developed by Hi-Rez Studios, creators of the MOBA SMITE. The game is rooted in a colorful sci-fi fantasy setting featuring Champions, playable characters that have their own unique fire-function and abilities. Combat in Paladins is also nearly entirely skillshot-based, meaning projectiles can be dodged. Although each champion has its own personality and core skills, to get around Paladins' Maps the real character variation comes from a deckbuilding Cards System that augments a champion in different ways.
Source: Gamepedia

The MOBA version of the famous "tower"-action defense.
This is currently in Beta and might change over time!

Awesomenauts is a Multiplayer Online Battle Arena (MOBA) and an accessible 3-on-3 action platformer. Head out to the online battlefields together with your friends as an online party or in local splitscreen, and never worry about having to wait for an online match because of drop-in matchmaking!

Play as several Awesomenauts as you storm the online battlegrounds and unlock loads of new abilities and characters for your arsenal.

Devise strategies as you upgrade and customize each character's skills to suit your playing style. Expect new items and Awesomenauts to be added regularly!