Games like Trantor: The Last Stormtrooper
Games like Trantor: The Last Stormtrooper include METAL SLUG 3, Huntdown, Broforce, METAL SLUG, and Contra Anniversary Collection. We matched them by the tags players give Trantor: The Last Stormtrooper on Steam (Action, Retro, Side Scroller, Sci-fi, and Platformer): closest matches first, and among equally close ones the better-known games.

METAL SLUG 3
Shared: Action · Arcade · Side Scroller

Huntdown
Shared: Side Scroller · Action · Shooter

Broforce
Shared: Action · Platformer · Side Scroller

METAL SLUG
Shared: Action · Side Scroller · Arcade

Contra Anniversary Collection
Shared: Action · Retro · Side Scroller

Contra: Operation Galuga
Shared: Action · Arcade · Platformer

Blazing Chrome
Shared: Action · Retro · Side Scroller

METAL SLUG XX
Shared: Action · Retro · Arcade

Warhammer 40,000: Boltgun
Shared: Retro · Action · Shooter

Shovel Knight: Treasure Trove
Shared: Retro · Platformer · Action

Terminator 2D: NO FATE
Shared: Side Scroller · Action · Arcade

Bloodstained: Curse of the Moon
Shared: Action · Retro · Platformer

METAL SLUG 2
Shared: Action · Side Scroller · Retro

METAL SLUG X
Shared: Action · Arcade · Retro

STRIDER
Shared: Action · Platformer · Side Scroller

Sonic Mania
Shared: Retro · Platformer · Action

Mega Man 11
Shared: Action · Side Scroller · Platformer

Half-Life 2
Shared: Action · Sci-fi · Shooter

Intrusion 2
Shared: Action · Platformer · Sci-fi

Mighty No. 9
Shared: Action · Platformer · Side Scroller

Soda Crisis
Shared: Action · Side Scroller · Platformer

Rogue Legacy 2
Shared: Action · Arcade · Platformer

Kero Blaster
Shared: Side Scroller · Platformer · Arcade

My Friend Pedro
Shared: Action · Shooter · Side Scroller