Single-player games like UFO ENEMY KNOWN
Below are 8 single-player Steam games similar to UFO ENEMY KNOWN, 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 UFO ENEMY KNOWN page.
Ranked picks
- 1

Red Faction®: Armageddon™
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action with UFO ENEMY KNOWN.
Red Faction: Armageddon Path to War includes 4 new missions, 2 unlockable items and 10 new achievements!
- 2

Hive Jump 2: Survivors
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Indie with UFO ENEMY KNOWN.
Become an agent of vengeance in this bullet-heaven action roguelite! You are the lone survivor of your squad, on an alien planet with just your weapon, a jetpack, and the courage to keep fighting. Kill off alien swarms and transform their valuable guts into explosive upgrades and vital utilities.
- 3

Destructive Physics - Destruction Simulator
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Indie with UFO ENEMY KNOWN.
Slowmotion, gravitation control, destructible terrain, blackhole and much more! Destroy a small (huuge) building, using different types of weapons (even custom). When you get tired of exploding prepared structures, you can always visit the map editor to build whatever you want.
- 4

Door Kickers 2: Task Force North
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Indie with UFO ENEMY KNOWN.
Command military Special Ops Teams in gripping tactical combat against a Middle East-based terrorist network. Sequel to RockPaperShotgun's "Best Tactics Game of 2014".
- 5

Teardown
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Indie with UFO ENEMY KNOWN.
Prepare the perfect heist in a fully destructible, simulated voxel world. Tear down walls with vehicles or use explosives to create your own shortcuts. Shape the environment to your advantage in the most creative ways you can imagine. Play solo or with up to 12 players in multiplayer.
- 6

Wreckfest
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Indie with UFO ENEMY KNOWN.
Wreckfest is a demolition derby themed racing game with soft-body damage modeling, sophisticated driving dynamics and in-depth vehicle upgrading, featuring both demolition derbies and more traditional track races. It’s all about fun, breakneck racing and over-the-top crashes.
- 7

Half-Life 2
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action with UFO ENEMY KNOWN.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
- 8

MechWarrior 5: Mercenaries
Single-player alternative to UFO ENEMY KNOWN — playable solo, no multiplayer required. Shares Action and Simulation with UFO ENEMY KNOWN.
The year is 3015. The battlefields are dominated by war machines known as BattleMechs. Level entire cities and decimate the enemy in your BattleMech. Follow a quest for glory and revenge. Manage an expanding mercenary company. Fight alongside your friends with a four-player PvE co-op.