Single-player games like Half-Life: Opposing Force
Below are 22 single-player Steam games similar to Half-Life: Opposing Force, 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 Half-Life: Opposing Force page.
Ranked picks
- 1
Half-Life: Blue Shift
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
- 2
Half-Life
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
- 3
Black Mesa
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Relive Half-Life.
- 4
Crysis Warhead®
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Pulse-racing new installment from 2007's PC Game of the Year*: Play as Sergeant Sykes and experience a whole new side of the battle. A standard combat mission behind enemy lines becomes critical when you discover your enemies have captured something of vital importance to the ensuing war.
- 5
Halo: Campaign Evolved
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Halo: Campaign Evolved is a faithful yet modernized remake of Halo: Combat Evolved’s campaign, rebuilt from the ground up.
- 6
STAR WARS™: Dark Forces Remaster
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
The evil Empire is currently creating a doomsday army behind a veil of secrecy. However, they are no match for the Rebel Alliance's covert operations division. Your mission is to infiltrate the Empire and put an end to their plans for terror and domination.
- 7
Call of Duty®: Black Ops
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
The biggest first-person action series of all time and the follow-up to critically acclaimed Call of Duty®: Modern Warfare 2 returns with Call of Duty®: Black Ops.
- 8
Aliens vs. Predator™
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.
- 9
System Shock® 2 (1999)
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
"Remember, it is my will that guided you here. It is my will that gave you your cybernetic implants, the only beauty in that meat you call a body. If you value that meat... you will do as I tell you." The cult classic sci-fi horror FPS-RPG has returned.
- 10
Resident Evil: Operation Raccoon City
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Experience the Fear: Set in the terrifying world of Resident Evil.
- 11
Half-Life 2
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
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.
- 12
Resident Evil 3
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Jill Valentine is one of the last remaining people in Raccoon City to witness the atrocities Umbrella performed. To stop her, Umbrella unleashes their ultimate secret weapon: Nemesis! Also includes Resident Evil Resistance, a new 1 vs 4 online multiplayer game set in the Resident Evil universe.
- 13
Dishonored
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Dishonored is an immersive first-person action game that casts you as a supernatural assassin driven by revenge. With Dishonored’s flexible combat system, creatively eliminate your targets as you combine the supernatural abilities, weapons and unusual gadgets at your disposal.
- 14
Tales from the Borderlands
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required.
Tales from the Borderlands is a five-part episodic game set on the unforgiving world of Pandora between the events of Borderlands 2 and Borderlands 3. This is a story full of Borderlands' trademark humor, following two adventurers on their quest for greatness.
- 15
Spec Ops: The Line
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
A Third-Person modern military Shooter designed to challenge players' morality by putting them in the middle of unspeakable situations.
- 16
Mass Effect (2007)
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
As Commander Shepard, you lead an elite squad on a heroic, action-packed adventure throughout the galaxy.
- 17
Borderlands 2
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
The Ultimate Vault Hunter’s Upgrade lets you get the most out of the Borderlands 2 experience.
- 18
Borderlands 3
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
The original shooter-looter returns, packing bazillions of guns and a mayhem-fueled adventure! Blast through new worlds and enemies as one of four new Vault Hunters.
- 19
Borderlands 4
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Borderlands 4 is a mayhem-fueled looter shooter, jam-packed with billions of weapons, deadly enemies, and intense co-op action. Break free from a dangerous hidden planet as one of four new badass Vault Hunters.
- 20
Borderlands: The Pre-Sequel
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Launch into the Borderlands universe and shoot ‘n’ loot your way through a brand new adventure that rockets you onto Pandora’s moon in Borderlands: The Pre-Sequel!
- 21
Borderlands Game of the Year
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Get ready for the mind blowing insanity! Play as one of four trigger-happy mercenaries and take out everything that stands in your way! With its addictive action, frantic first-person shooter combat, massive arsenal of weaponry, RPG elements and four-player co-op, Borderlands is a breakthrough experience that challenges all the...
- 22
Tiny Tina's Wonderlands
Single-player alternative to Half-Life: Opposing Force — playable solo, no multiplayer required. Shares Action with Half-Life: Opposing Force.
Embark on an epic adventure full of whimsy, wonder, and high-powered weaponry! Roll your own multiclass hero then shoot, loot, slash, and cast on a quest to stop the Dragon Lord.