Single-player games like Action Alien: Tropical
Below are 13 single-player Steam games similar to Action Alien: Tropical, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Action Alien: Tropical page.
Ranked picks
- 1

Action Alien
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Jump into the action and battle your way through hordes of aliens from deserts to tropical islands with fully destructible environments !
- 2

Black Mesa
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Relive Half-Life.
- 3

Serious Sam HD: The First Encounter
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!
- 4

Diaries of a Spaceport Janitor
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Indie and Adventure with Action Alien: Tropical.
Diaries of a Spaceport Janitor is an anti-adventure game about picking up trash in an alien bazaar. Play as the Janitor, an Alaensee girlbeast with a municipally-subsidized trash incineration job and dreams of leaving the planet of Xabran's Rock far behind her.
- 5

Resilience Wave Survival
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Resilience: Wave Survival is a physics based endless wave survival shooter. Explore to Search for Weapons and Ammo to help Defeat the Enemies, better find food and water too if you want to Survive for longer, but Beware of the Tripods stalking the lands.
- 6

Prodeus
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.
- 7

Lovely Planet Arcade
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Relive your journey to Lovely Planet in this brand new adventure packed with impossible tests of skill and patience. Craft intricate combos to unfold the complex puzzle of flying projectiles and moving targets into a graceful sequence of well timed shots and jumps.
- 8

Downwell
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Downwell is a curious game about a young person venturing down a well in search of untold treasures with only his Gunboots to protect him.
- 9

Aerial Destruction
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Take off your helicopter and unleash destruction on the armed groups of bio-engineered mutants through various missions and environments !
- 10

Cyborg Arena
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
In a desert post-apocalyptic world ruled by cyborgs, you are the last soldier alive. Drive across defense lines and reach the evacuation point ! Listen to radio communications ! Also featuring an arena mode.
- 11

Action Alien: Survival
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Fight hordes of aliens in a completely destructible petrol station with many weapons to grab and aliens to fight !
- 12

Zombie Road Rider
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Drive through cities and forests infested of zombies, crush all the undeads on your way, rescue the survivors in different environments and unlock all the vehicles. Achieve the best score!
- 13

Cyborg Arena 2
Single-player alternative to Action Alien: Tropical — playable solo, no multiplayer required. Shares Action and Indie with Action Alien: Tropical.
Armed with your minigun, complete all the missions and unleash your firepower on the cyborgs! Keep moving and achieve the best online score !