TowerFall - TowerFall is an Arcade, Action, Puzzle, Side-Scrolling, Single and Multiplayer video game developed by Matt Thorson and published by Matt Makes Games.
Hollow Knight - Descend into the Dark Venture down into a beautiful, ruined world of insects and heroes
Brawlhalla - Brawlhalla is a Massively Multiplayer Online, Role-playing, Fighting, Fantasy, Beat’em up, and Co-op video game created and published by Blue Mammoth Games.
Super Meat Boy - Let's start with what's the same: Dr. Fetus is still a jerk, gameplay is super challenging but fair, there are tight controls and great levels and you will die. a lot.
Jump 'n Bump - Bounce on other bunnies to defeat them in this classic multiplayer platformer.
Secret Maryo Chronicles - Secret Maryo Chronicles is an Open Source two-dimensional platform game and is using an Open Graphics Library for the best possible graphic design and stock performance.