Games like Lone Bastion
Games like Lone Bastion include Halo: Spartan Assault, 12 is Better Than 6, BALL x PIT, Escape From Duckov, and Intravenous 2. We matched them by the tags players give Lone Bastion on Steam (Top-Down Shooter, Action, Class-Based, Gun Customization, and Minimalist): closest matches first, and among equally close ones the better-known games.

Halo: Spartan Assault
Shared: Top-Down Shooter · Action · Shooter

12 is Better Than 6
Shared: Action · Top-Down Shooter · Shooter

BALL x PIT
Shared: Action · Top-Down Shooter · Arcade

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

Intravenous 2
Shared: Action · Top-Down Shooter · Gun Customization

STAR WARS™ Battlefront™ II
Shared: Action · Space · Shooter

Deployment
Shared: Top-Down Shooter · Action · Class-Based

Cyberhunt
Shared: Action · Indie · Arcade

Hotline Miami
Shared: Action · Indie · Top-Down Shooter

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

Call of Duty®: Infinite Warfare
Shared: Action · Space · Futuristic

Bit Blaster XL
Shared: Action · Arcade · Shooter

Starship Troopers: Extermination
Shared: Action · Arcade · Combat

Battlefield™ 2042
Shared: Action · Shooter · Futuristic

SYNTHETIK: Legion Rising
Shared: Top-Down Shooter · Action · Indie

RUNNING WITH RIFLES
Shared: Top-Down Shooter · Action · Top-Down

Sky Force Reloaded
Shared: Top-Down Shooter · Action · Arcade

Hotline Miami 2: Wrong Number
Shared: Action · Top-Down Shooter · Indie

Windowkill
Shared: Action · Arcade · Minimalist

SUPERHOT
Shared: Action · Minimalist · Indie

RUINER
Shared: Action · Top-Down Shooter · Indie

Titanfall® 2
Shared: Action · Shooter · Futuristic

Heat Signature
Shared: Space · Action · Indie

Zombieville USA 3D
Shared: Action · Top-Down Shooter · Arcade