Games like Memory Lost
Games like Memory Lost include Insect Swarm, RUINER, The Ascent, Furi, and Halo: Spartan Assault. We matched them by the tags players give Memory Lost on Steam (Hack and Slash, Shoot 'Em Up, Top-Down Shooter, Twin Stick Shooter, and Beat 'em up): closest matches first, and among equally close ones the better-known games.

Insect Swarm
Shared: Shoot 'Em Up · Top-Down Shooter · Shooter

RUINER
Shared: Top-Down Shooter · Cyberpunk · Twin Stick Shooter

The Ascent
Shared: Top-Down Shooter · Cyberpunk · Shooter

Furi
Shared: Hack and Slash · Shoot 'Em Up · Beat 'em up

Halo: Spartan Assault
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter

Brigador: Up-Armored Edition
Shared: Twin Stick Shooter · Top-Down Shooter · Action

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Isometric · Action

Shadowgrounds
Shared: Top-Down Shooter · Shooter · Top-Down

Last Epoch
Shared: Hack and Slash · Isometric · Top-Down

HELLDIVERS™ Dive Harder Edition
Shared: Top-Down Shooter · Twin Stick Shooter · Shooter

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Twin Stick Shooter · Action

Killsquad
Shared: Hack and Slash · Top-Down Shooter · Twin Stick Shooter

Alien Shooter
Shared: Shooter · Top-Down · Top-Down Shooter

Bright Memory
Shared: Hack and Slash · Shooter · Action

Redeemer: Enhanced Edition
Shared: Beat 'em up · Hack and Slash · Top-Down

Alien Breed: Impact
Shared: Shooter · Top-Down · Action

MADNESS: Project Nexus
Shared: Hack and Slash · Beat 'em up · Shooter

The Hong Kong Massacre
Shared: Top-Down Shooter · Twin Stick Shooter · Action

Halo: Spartan Strike
Shared: Top-Down Shooter · Shooter · Twin Stick Shooter

Greedland
Shared: Shoot 'Em Up · Twin Stick Shooter · Top-Down Shooter

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

Nex Machina
Shared: Twin Stick Shooter · Shoot 'Em Up · Action

Shadowgrounds Survivor
Shared: Top-Down Shooter · Shooter · Isometric

Cyberhunt
Shared: Shoot 'Em Up · Twin Stick Shooter · Action