可以和朋友在线一起玩的Difficult · Retro游戏共 106 款，包括Revolution Ace、Giana Sisters: Twisted Dreams和Cave Story+。
全部游戏: 24
A deep, tactical shoot'em up. With every takedown, you’ll earn cash and xp to upgrade your ship and unlock new abilities. Online and local co-op. Unique versus mode. Realistic physics and water simulation.
Giana Sisters: Twisted Dreams is a blistering hardcore platformer with contrasting worlds.
Developed by id Software, and originally released in 1993 and 1994, the definitive, newly enhanced versions of DOOM + DOOM II are available as a combined product.
The greatest warriors of all time and space have been summoned to battle for the amusement of an ancient alien race. Wield a variety of guns and power-ups as you fight for glory against ruthless combatants in this fast-paced single-player and multiplayer FPS.
Enjoy fast-paced multiplayer gaming with Deathmatch Classic (a.k.a. DMC). Valve's tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.
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.
基础版支持双人本地合作；Synchrony扩展本地人数至4人，并加入最多8人的在线模式。每一步都要跟上音乐节拍。
The original epic introduction to the eternal KUNG FURY beat ‘em up saga. New stages, and the Hackademy. Both THE ARCADE STRIKES BACK and the A DAY AT THE BEACH campaign.
AROUND EVERY CORNER. Face against stealthy antagonists that will take advantage of your expectations.
Saviors brings the best bullet hell experience you can find on Steam. Play through 18 challenging stages in this ultimate test of tactics and reflexes.
Chip destructible bosses apart pixel-by-pixel in this twin-stick bullet-hell shooter.
Eugene must battle aliens and the undead in search of a truck rim, as it seems to be his ticket home.
Classic side-scrolling gameplay is reporting back for duty with Bionic Commando Rearmed, a remake of the classic NES game, out now on PC.20 years after the 8-bit classic was released, Bionic Commando Rearmed recreates the world of the original with a complete "2.5D" visual revamp.
The classical side-scroll action game, "Double Dragon" series' newest sequel! A new legend begins!!
SUNSOFT relapses... The legendary Bad Game Hall of Famer "Ikki" is back, and this time it's a multiplayer experience! You can't start a riot with just one or two people! Enlist up to 16 friends in this Roguelite madness... Ikki but united!
GARBANZO QUEST! The crazy bullet-heck platformer where your main weapon is your own spit! Bring a friend! Hand-crafted challenges, secrets, and branching paths galore!
A fast paced action shooter inspired by the arcade classic Super Pang! Use a wide selection of weapons and powerups to tear through increasingly challenging levels.
Super Cyborg is an old school non-stop hardcore run'n'gun action game! You are an elite battle cyborg who is sent in to investigate a series of anomalies on a mysterious island. The merciless alien known as the 'Xirxul life form' has been awakened by unwitting scientists and now: all humanity is in danger!
Vibrant Venture is a singleplayer 2D adventure platformer game featuring a quirky cast of characters! The game features four playable characters with multiple unique abilities that can be combined for extremely versatile, fluid and fun movement!
The best flying disc game of all time is back, with amazing hand-drawn graphics, crazy new moves, gameplay mechanics and awesome characters and stages! New update brings new playable characters, new training mode, full crossplay support and more.
Experience the addictive gameplay of old-school arcade favourites, updated and improved for the 21st century! Unique retro-futuristic sound and graphics, player responsive difficulty, and a subtle system of tactics combined with classic gameplay make Ultratron a fun and hypnotic arcade blast.