If you have the time and hard drive space, you can squeeze a huge amount of free entertainment out of your Steam client. With that in mind we've organised the best free and free-to-play games together into one list. The free games section consists of games that contain no microtransactions. You might be able to buy extra episodes or DLC packs, but you'll get the full core experience for your download in this category.

The free-to-play section contains games that are supported by in-game microtransactions. We've considered the fairness of the in-game stores when selecting these games, and believe you can get a lot of fun out of them before you put in credit card details. We'll update the list over time as we discover more gems hidden away in the Steam store.

FREE GAMES

Alien Swarm

Link: Steam

Up to four players fight through space stations overrun with hordes of alien bugs. Beating missions earns you weapons and equipment that let you specialise your marine. Expect almost Starship Troopers scale hordes at points, as the AI director tries to push your team to the brink of death.

Alien Swarm is a forgotten Valve experiment, but it's perfectly good fun in co-op. The complete game code and mod tools are available, but the community never produced enough to sustain the game beyond its opening months. It's still worth downloading the game with some friends and enjoying what's there though.

A Raven Monologue

Link: Steam

A beautifully drawn experimental short story about a mute raven trying to interact with his townsfolk. The project is described as an attempt "to tell stories or to communicate an experience using a constrained work of interactive art." It's quick, simple to play, and full of room for interpretation.

Cry of Fear

Link: Steam

A quality Half-Life total conversion that's full of scares. The game twists the old GoldSrc engine to give you an inventory system and a big, dark city to explore. Prepare yourself for relentless tension across eight hours of exploration and combat with 24 different weapons. The download also includes a bunch of custom campaigns and an unlockable extra campaign once you beat the main story. That's good value for a free download.

House of Abandon

Steam: Link

This experiment eventually became the excellent short story compilation Stories Untold. You can still download it to your library by heading to the page linked above and clicking 'Download PC Demo'. The first part follows someone playing a text adventure as things start to get strange, and quite scary.

Doki Doki Literature Club!

Link: Steam

It may look like a cheerful classroom drama but don't be fooled, Doki Doki Literature Club! plays with that facade. Sedate chats with classmates create a languid impression for the first act or so, but dark twists await—there's a reason the game opens with a content warning. If you end up enjoying it then you might also like Pony Island and Undertale. 

Off-Peak

Link: Steam

It's the future, you're stuck in a train station, and everything is weird. Chat with the station's odd inhabitants and explore its twisted side passages to discover surreal little anecdotes and piece together meaning from the assembled scraps. It only takes about half an hour to complete and the music is sweet, so give it a download.

FREE-TO-PLAY GAMES

Dota 2

Link: Steam

Dota 2 is one of the biggest games on Steam. Described simply, two teams of five wizards battle to knock over towers and flatten the enemy base in battles that tend to last between 30 minutes and an hour. In practice it's one of the deepest and most complicated competitive games in the world. Every year the huge International tournament draws millions of viewers, and with 110+ heroes and a consistently shifting meta, this could be the only game you ever need in your Steam library.

The free-to-play implementation is mostly good. Most microtransactions are tied to cosmetics. In addition to individual item purchases you can also buy battle passes that grant access to modes, quests that you complete by playing games, and more cosmetic items.

Warframe

Link: Steam

This third person action RPG about futuristic ninjas can be completely baffling for new players, but if you persist with it you'll find a deep and rewarding game on the verge of some of its most ambitious updates to date. At launch it was a game about repeating short missions—and that's still part of it—but there are also open world zones and plans to add co-op space combat. Warframe has been getting better and better in the last few years, and now we reckon it's one of the best free to play games on PC. 

You can spend real money to speed up crafting time, and to buy items and frames outright. Everything is perfectly craftable using in-game currency however, and players seem more interested in using the real-money Platinum currency to unlock new colour schemes.

Card Hunter

Link: Steam

Card Hunter is a cute squad RPG based around digital collectible cards. You battle through dungeons under the guidance of a dungeon master, levelling up your squad of heroes, building your deck and enjoying some affectionate tongue in cheek digs at D&D along the way. There's loads to play before you ever see a payment screen and there are also co-op and competitive modes. If only more free-to-play games were like this.

Team Fortress 2

Link: Steam

This team shooter has been around since 2007, but the character designs are timeless and the class design is still magnificent. Few shooters can point to a class as innovative as The Spy, who can disguise himself as an opposing team to sabotage their gadgets and stab their heavies in the back. If you prefer long-range engagements, the sniper has you covered, or you can ambush enemies up close with the Pyro. Whatever your play style, there's a class to match, and with enough play you will be switching between classes frequently to help your team push the cart or take a tricky point.

Path of Exile

Link: Steam

Path of Exile is one of the deepest action RPGs on the market, and one of the most generous for being free-to-play. The basic structure ought to be familiar: pick a class and embark on Diablo-style killing sprees to earn loot and level up. There's a huge amount of class and item customisation to dig into as you start to move past the tutorial stages. Slot different patterns of gems into your armour sets to min-max your character and take them into even tougher dungeons. You only need to pay money for cosmetics that reskin your weapons and armour

EVE Online

Link: EVE Online

This space MMO is famous for producing incredible stories of war and betrayal. Its player-driven corporations are fraught political entities that can be very inaccessible to new players. Even if you don't persist long enough to break into the grand PvP game it's still a gorgeous universe full of beautiful spaceships and nebulae. Some ships and skills are locked off in the free-to-play version, but you can spend a huge amount of time in the game before you need to look at paying for premium access.

Star Trek Online

Link: Steam

Fly ships, gather a crew, and beam down to planets with an away team in this massive free-to-play MMO. It has aged quite a bit since launch and it's riddled with microtransactions, but you can still play through the story and see every side of the game without paying. If you do get drawn in to collecting high end ships and decking out your crew with signature Star Trek livery then expect to pay for it. You can grind for items using in-game currency, but for advance items that will take longer than seems reasonable. If you're looking for a free Star Trek experience, however, it's surprisingly fun.

Realm Royale

Link: Realm Royale

If you like the idea of Fortnite but can't stand building, then Realm Royale might be your next battle royale game. It's still in Early Access, but there are enough features to separate it from Fortnite (which isn't on Steam), and paid-for battle royale games like PlayerUnknown's Battlegrounds. Realm Royale has a fantasy element with five classes and different spells and abilities for each. Hunters can leave proximity mines, while mages can heal themselves with ice magic. It's perfectly playable at this stage in Early Access, but expect it to evolve a lot in the coming months.

Battlerite

Link: Steam

An arena-based top-down brawler with shooting, spells and a colourful art style. As we've observed before, it's basically a smartly designed clutch teamfight generator. If you're tired of the long lanes of Dota 2 or League of Legends then you might enjoy Battlerite's punchy, fast-paced encounters, and while it's competitive, it has a cleaner learning curve than the major lane-pushing games. A separate paid-for Battlerite Royale mode is heading to Early Access in September, which has annoyed the community, but you can still find a battle in the original 2v2 and 3v3 modes.

Valve opened the gates on the 2018 Dota 2 short film contest at the end of May, and fans of the MOBA wasted no time submitting their videos. Passion aside, it's not hard to see why: the top submissions will be featured in The International 2018 Battle Pass, and the winners will be shown on-stage at The International itself. There's also some sizable prize money up for grabs: $25,000 to first place, $10,000 to second place, $5,000 to third place, and $500 to the rest of the top 10. 

There are only a few simple rules on submissions, which you can read in full here. The key points are that entries must be 90 seconds or less, they must be original films created for the contest, and they must pertain to Dota 2. Notably, they "can use any form or combination of animation or live-action," so using Valve's popular Source Filmmaker is not a requirement. This year's entries hit the whole spectrum of techniques, but the past few days in particular have seen some stunning animated films, presumably because animation is hard and these things needed every second in the oven that they could get (the contest entry period closed yesterday morning). Here are four of the best: 

Ursa Minor, by Alexander Frey and his team. 

On The Cliff, by Keller Max and his team. 

 Kobold Blues, by Erick Wright and his team. 

The Final 88 Seconds of an 8-Hour Game, also by Erick Wright and his team (multiple submissions are allowed).  

A useful roundup of this year's entries is available on the Dota 2 subreddit, and you can find more on the contest's Steam Community page, which is also where you can vote for your favorites.  

Update: And that's game, with the AI victorious in two rounds out of three. However, the show's still going on Twitch with OpenAI explaining more about how they built and tested their team, and what's next for them.

Original story: Research institute OpenAI, which Elon Musk co-founded in 2015, is set to send its super-smart self-taught Dota 2 bots to The International 2018 later this month to take on a team of experienced pros. Today, those bots are playing a benchmark match against five top players, including former pros, casters and analysts. The action will stream live on Twitch from 12:30pm PT/3:30pm ET/8:30pm BST. Click here to watch.

The human team is made up of Blitz, Cap, Fogged, Merlini and Moonmeander, with commentary from Purge and ODPixel.

The bot team, called OpenAI Five, has certainly had enough practice to hold its own: it has been playing 180 years' worth of games against itself every day, picking up the intricacies of the MOBA along the way. 

OpenAI's 1v1 bot beat pro player Danil "Dendi" Ishutin at last year's The International, and the institute says the learning process for OpenAI Five is much more complex, requiring 256 GPUs and 128,000 CPU cores.

If you're interested, it's worth reading OpenAI's blog post on the challenges its Five team faces, including the complex rules of Dota 2, and the fact that, at any given time, a hero could have more than 100,000 possible actions open to them.

We all know that playing online with other random humans can be a pain, and apparently Ubisoft got plenty sick of watching players spew racist language in Rainbow Six: Siege. The developer instituted a system that automatically bans players who enter racial slurs into the game chat, which has resulted in plenty of outrage. 

If Ubisoft can make life tough for these people, what are the other major multiplayer games doing to combat racism in their games? We checked in with Blizzard, Valve, and other developers to see how they deal with racial slurs, and what they do to the players who use them.

League of Legends

How does Riot police harassment?

Of all the games on this list, League of Legends might have the most extensive code of conduct, known formally as the “Summoner’s Code.” League’s “Instant Feedback System” has seen some reforms, but it basically scours through the game’s chat logs after someone submits a player report, then doles out a verdict in 15 minutes or less, or your pizza is free. The first offense gets you a 10-game chat restriction, then a 25-game chat restriction, then a two week ban, and finally a permanent ban. Offending players even get a pleasant little in-game message about why they’re getting the hammer.

How do well-behaved players fight back?

Players can submit a report against someone at the end of a game, and the Instant Feedback System should get a verdict within 15 minutes. Sometimes, but not always, players will be notified if their report resulted in the punishment of another player, but Riot says that even if you don't get a message, that doesn’t necessarily mean the other player got off scot free.

“We want a future where League is wholly free of slurs and hate speech, but penalties alone won’t get us there," said Riot senior technical designer Kimberly Voll in a statement to PC Gamer. "In recent years, we’ve been focusing more on the establishment of norms. We believe if there aren’t clear, understood, and shared rules on what’s OK in gaming, like there are in sports, then we’ll just be enforcing the same nasty things forever. Like Jeff Kaplan mentioned on behalf of Overwatch last year, enforcement alone stretches budgets. We agree, and believe it limits our imagination and audience as well.”

Fortnite

How does Epic Games police harassment?

It’s unclear how extensive punishments for abusive players are in Fortnite. Search online and you’ll find far more forum posts about temporary or permanent bans for players who break the rules by teaming up in solo mode than for harassment. There’s no text chat, just a voice chat system that’s push-to-talk by default for communication with your squadmates. Epic’s primary focus seems to be on cheaters, going so far as to file a lawsuit against two more prominent players. Fortnite’s code of conduct page does warn players to “be graceful in victory and defeat." 

"Discriminatory language, hate speech, threats, spam, and other forms of harassment or illegal behavior will not be tolerated,” it reads. PC Gamer has reached out to Epic for a more thorough explanation of how their system works, but has yet to receive a reply.

How do well-behaved players fight back?

Fortnite has a typical system wherein you can report the player who killed you in the post-death menu. If you need to report another player or your own teammates, the report function is squirreled away in the “feedback” menu option, and you need to be able to supply that player’s username. Epic has also invited players to use their support center for bigger issues. 

Dota 2

How does Valve police harassment?

Valve operates on a typical system where more reports get you banned for longer periods of time. The lower rung of bans can be as short as 10 minutes to an hour. You’ll get a day-long ban if things get a bit more serious. And if you’re a real jerk, you’ll get a week, then a month or two, and finally a six month or permanent ban. Valve deliberately keeps this process vague, but it does warn abusive players ahead of time that continued bad behavior will result in longer bans.

How do well-behaved players fight back?

Valve has a pretty typical report system in place, but it’s basically only available at the end of a match. Players can pick from three categories (communication abuse, intentional ability abuse, and intentional feeding) and can leave a brief comment. You can leave up to three reports per week, and you’ll be notified if any action is taken against another player you reported.

PlayerUnknown’s Battlegrounds

How does PUBG Corporation police harassment?

If a PUBG player is caught harassing another player with racist or sexist language, they will first receive a three-day ban. A second incident will net a full week, and a third incident will net a full month. Any repeat offenses beyond that will earn a player a permanent ban. You can look at the comprehensive chart for a better idea of how other issues are tackled.

“It is unacceptable to disrespect or use offensive words towards others based on their race, gender, nationality, etc,” the code of conduct reads.

How do well-behaved players fight back?

There’s currently no way for someone to report another player who didn’t kill them, which makes reporting racist behavior a pain. PUBG representatives have said that players must submit a report on the PUBG forums that includes the reporting player’s username, the name of the player you’re reporting, the time and date of the incident, and a description of the incident. I wouldn’t want to be the guy sifting through all that footage.

PUBG allows you to directly report auser after they’ve killed you, although the closest category available for racial discrimination would be “improper nickname.” This feedback system is clearly not designed for combating harassment.

CS:GO

How does Valve police harassment?

Although CS:GO uses one of the most effective automated systems for shutting down cheaters, VACnet, it does not currently automatically ban or silence players who use racist language. VACnet and its accompanying "Overwatch" system are primarily focused on catching hackers and griefers. The Overwatch system recruits experienced players with good records, then gives them the tools to review footage of reported matches, and it’s up to them to give a collective verdict. If a player is caught being awful, they receive either a “minorly disruptive” or “majorly disruptive” designation. The first results in a ban of “at least 30 days,” but a second offense gets a lifetime ban.

A “majorly disruptive” designation automatically gets you a permanent ban, but Valve’s description only mentions cheating, not abusive behavior. There’s no mention of racism, sexism, or general verbal abuse in Valve’s descriptions of Overwatch or VACnet, so it’s unclear if the company has any major initiative against harassment other than the mute and report buttons.

We reached out to Valve for clarification on how its process works, but did not receive a reply by publishing time.

How do well-behaved players fight back?

Players can select another player during a match, which opens up an option to report or commend them. Abusive text and voice chat sit comfortably at the top of the list of options. You can also mute the player by checking the “block communications” box.

Rocket League

How does Psyonix police harassment?

Rocket League might be the closest to Rainbow Six: Siege in terms of automating bans for racial slurs. Back in 2017, Psyonix instituted a secret list of 20 words and variants that can trigger bans. Psyonix says each word has a certain threshold, and once that’s met, multiplayer bans will start at 24 hours, then 72 hours, a week, and finally a permanent ban.

Psyonix also has a chat ban system in place that, well, bans jerks from using the text chat window. It’s a little more lenient than the general language ban system, but players have to report the abuse (rather than the game auto-scanning), then the system scans the game that was just played for abusive language. If a reported player is found guilty, they're banned from chatting for 24 hours to one month. It’s not instant like Rainbow Six Siege’s. If a player insists on using abusive language after their initial chat ban is up, they “may” get a permanent overall game ban. Players who get chat bans are notified whenever it happens.

How do well-behaved players fight back?

Rocket League's reporting mechanism is straightforward. You just click on the offending player’s profile, select “mute/report,” and then select from the available categories. Verbal harassment sits at the top. If Psyonix takes action against a player, they’re notified later in the main menu.

Overwatch

How does Blizzard police harassment?

Blizzard is one of the most outspoken studios on toxicity and related issues. However, that outspokenness more often translates to support tools for well-behaved players than any sort of explanation for how bad players are punished.

Blizzard used to punish repeatedly abusive chat users in Overwatch by simply muting them, but still allowing them to play. That’s now changed, with those players receiving lengthier and lengthier bans for each successive offense. Blizzard is unclear on the rubric it uses, and unclear on how that’s balanced between automated systems and real humans banging the gavel, but it does say that a player with enough reports and punishments on their record will receive a permanent ban. Negative players are given warnings prior to an actual punishment, something director Jeff Kaplan has said has helped stop players from causing further trouble.

How do well-behaved players fight back?

Since launch, Blizzard has allowed PC players to report individual players via the report function, and added the function to consoles in mid-2017. Besides picking a category of bad behavior, players also have the ability to include a brief description of their experience with each individual report. Blizzard has also stated that it searches out recordings of toxic behavior on YouTube, Twitch, or other sites to find negative players and address them.

After/during each match, Overwatch players can also select up to two players to block with the “avoid as teammate” option. Players can deselect or replace one person with another, but Blizzard has stated that that number may rise if the program doesn’t cause any issues. There’s also the new “find team” function that lets players avoid the pitfalls of solo queuing into a match with nothing but Hanzo mains.

PC Gamer reached out to Blizzard to clarify how these punishments are determined, but has yet to receive a response.