Volgarr the Viking (AKA: Völgarr the Viking) is an independent action game for multiple platforms, developed by Crazy Viking Studios and published by Adult Swim Games in 2013. It's mainly inspired by classic side-scrolling hack and slash arcade video games from the 1980s like Rastan and Ghosts 'n Goblins, and retains similar graphical style and difficulty level.

Queen's Wish: The Conqueror is a retro- and pixel- style adventure role-playing game, developed and released by Spiderweb Software for various platforms. It is the first game work in the planned Queen's Wish series, which was made possible by crowdfunding and released in 2019. In game, you escape into an unpredictable open-ended story and cunning tactical combat, feel free to explore, fight for fame and power, and shape the world as you choose.

Pixelmash is a cross-platform pixel art editor that is perfect for retro-style 2D video game projects. It can easily create pixel art from photos, sketches, or scratches on Windows and Mac platforms, specially developed for 2D game makers, pixel artists, pixel hobbyists, and any lovers of the 8-bit and 16-bit eras.

Rogue Legacy is a pixel & retro style and rogue-like (in fact that's Castlevania-like, I think) action adventure game. The entire game features graphics & systems restoring the ancient ways and cartoon characters.

Vagante is a Rogue-Like indie small dungeon game inspired from Castlevania, Metroid, Dark Souls, and some other classic video game works. It has no complicated plot, only fairly subtle levels randomly generated by the program (including maps, props and its effects, equipment, traps, monsters, BOSS...), along with retro and pixel styles.