Games like Half-Life: Source

『UNBOUND PROVIDENCE』はレトロな3Dダンジョン探索アクションRPG。鉱山から繋がった未知の迷宮を探索しよう！

ASCEND and claim your rightful place as the Hand of the Empress. Become AB3, an immortal super soldier, in this action packed first-person shooter that combines old school style with new era gunplay.

Master the art of driving! Enjoy 50+ handcrafted levels with 9 vehicles and realistic car physics. No traffic — just pure driving skills. Unlock cars, test your skills in mini-games, or just drive casually without any worries!

A sci-fi 80s retro shooter and bullet hell. Use your plasma cannon and bombs to repell an alien invasion. Either defeat the alien robots building and upgrading the blocks and turrets - or blow all of their blocks up! 20 straightforward levels.

Join dangerous raids for loot or intense PvP battles in this new realistic military shooter set in a fractured multiverse. Fight in the quantum unstable zones over control of the active matter – the substance that bends time and space.

CONVRGENCE is an atmospheric VR extraction shooter set in the procedurally generated, ever-changing Chernokamensk Anomaly Zone. Scavenge loot, fight bandits and hunt for mystical artifacts — all with your loyal dog companion by your side. But extract before nightfall, or face what lurks in the dark.

Race through the streets in this third-person action runner, dodging obstacles or shooting them out of your way. Collect points, purchase powerful upgrades, and optimize your run to beat your high score. Can you make it to the top of the leaderboard?

No Emergency: Pestilence plunges players into the epicenter of a mysterious epidemic, where every arriving patient could be carrying a mutating pathogen, and a single mistake in a prescription turns the cure into poison.

Embark on your creative journey of vehicle design, as you create and operate vehicles to survive this dangerous open world. Anymaker is a detailed and technical vehicle builder and survival game. Design your chassis, build your engine, connect components, and travel into the unknown.

A collaborative exploration and survival game for 1-10 players, set in a procedurally generated afterlife inspired by Viking culture. Battle, build, and conquer your way to a saga worthy of Odin’s patronage!

Sublight is a space bullet heaven roguelike, where you captain a powerful warship and carve through escalating waves of enemies. Upgrade your arsenal, unlock new ships, and experiment with countless builds to dominate the battlefield.

Explore a simulated 1990s computer left running by someone who never came back. Search its files, uncover hidden games, and piece together their story.

Explore the forbidden catacombs of Paris, immersive and authentic experience of pure discovery and fascination.

Remember the RPG that defined a generation? ZENONIA is back—faithfully restored and now on Steam. Relive the adventure that kept you playing for hours, or experience it for the first time.

Fly, dodge, and score points — this is a real test of reaction and concentration, where every new record feels like a big victory over the ruthless cosmos.

SINGULARITY is a collection of 61 distinct games — from particle dreamscapes and detective puzzles to tactical combat and survival farming. Collect Embers in every level to grow and unlock more. The Particle Eggs keep expanding over time, so the journey never ends.

High intensity co-op roguelite space adventure party game for 2–4 players (or bots). Take on crew jobs, keep a failing ship alive, and survive procedural missions with endless exploration, light RPG progression, and real-time crisis gameplay.

Play a major role in an evolving simulation of simulations. Explore endless 2D and 3D dimensions spanning nearly every game genre, with 50+ experimental prototypes and stories whose worlds, systems, discoveries, and ideas can become part of the greater experience.