Games like EpicSelectly
Games like EpicSelectly include BALL x PIT, Nova Drift, Deep Rock Galactic: Survivor, Bit Blaster XL, and DoDonPachi Resurrection. We matched them by the tags players give EpicSelectly on Steam (Action, Shooter, 2D Platformer, Shoot 'Em Up, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Action · Bullet Hell · Shoot 'Em Up

Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Shooter

Deep Rock Galactic: Survivor
Shared: Bullet Heaven · Bullet Hell · Top-Down Shooter

Bit Blaster XL
Shared: Shooter · Shoot 'Em Up · Bullet Hell

DoDonPachi Resurrection
Shared: Shooter · Shoot 'Em Up · Bullet Hell

Planes, Bullets and Vodka
Shared: Action · Shoot 'Em Up · Shooter

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Action

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Shoot 'Em Up · Bullet Hell · Action

DEVIL BLADE REBOOT
Shared: Shooter · Action · Shoot 'Em Up

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Shooter · Shoot 'Em Up

Revolution Ace
Shared: Action · Shoot 'Em Up · Shooter

Chippy
Shared: Bullet Hell · Shoot 'Em Up · Shooter

DRAINUS
Shared: Action · Shooter · Shoot 'Em Up

Touhou Kinjoukyou ~ Fossilized Wonders.
Shared: Shooter · Action · Shoot 'Em Up

Angel at Dusk
Shared: Action · Shooter · Bullet Hell

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Shoot 'Em Up · Bullet Hell

Star Saviors
Shared: Action · Shoot 'Em Up · Bullet Hell

Crimzon Clover World EXplosion
Shared: Action · Shoot 'Em Up · Shooter

ESCHATOS
Shared: Shooter · Shoot 'Em Up · Bullet Hell

20 Minutes Till Dawn
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter

Void Scrappers
Shared: Action · Shoot 'Em Up · Bullet Heaven

Escape From Duckov
Shared: Action · Shooter · Top-Down Shooter

Mushihimesama
Shared: Action · Shoot 'Em Up · Bullet Hell

Alex Jones: NWO Wars
Shared: Action · Shooter · 2D Platformer