AI War 2

AI War 2

Arcen Games · October 22, 2019 · 4X, Grand Strategy, Multiplayer, Co-op, Tower Defense

Buy AI War 2 from Gameseal at $0.44 — the cheapest of 9 stores we compare.

PC
Very Positive87% · 1,56275Metacritic5playing now
Best price 64 Great deal
$0.44-97%
lowest tracked $0.26
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Where to buy AI War 2 — official stores

Fanatical
Standard Edition · Steam
-27%
$14.69
$19.99
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GreenManGaming
Standard Edition · Steam
$19.99
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Steam
Steam
Standard Edition · Steam
$19.99
Buy
Humble Store
Humble Store
Standard Edition · Steam
$19.99
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GOG
GOG
Standard Edition · DRM-Free
$19.99
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Cheapest AI War 2 keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Driffle INC
Standard Edition · Steam
$0.61
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Gameseal
Standard Edition · Steam
$0.44
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Eneba
Standard Edition · Steam
$0.56
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CJS CD Keys
CJS CD Keys
Standard Edition · Steam
$1.69
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AI War 2 price by region

AI War 2 costs £0.26 in the United Kingdom, €0.29 in Europe (EUR), $0.44 in the United States, zł1.61 in Poland, R$3.21 in Brazil, CA$16.75 in Canada, $19.99 in Georgia (USD), A$21.27 in Australia and NZ$28.99 in New Zealand right now.

Cheapest AI War 2 offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £0.26 −98% £11.38 £0.26 8
Europe (EUR) €0.29 −98% €12.34 €0.29 9
United Statesyour region $0.44 −97% $14.69 $0.44 9
Poland zł1.61 −98% zł71.99 zł1.61 6
Brazil R$3.21 −92% R$37.99 R$3.21 5
Canada CA$16.75 −27% CA$16.75 — 5
Georgia (USD) $19.99 $19.99 — 4
Australia A$21.27 −27% A$21.27 — 5
New Zealand NZ$28.99 NZ$28.99 — 4

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About AI War 2

✦ AI summary

Command a secret empire in hostile space, carefully avoiding the all-powerful AI while expanding territory and planning your strike against overwhelming odds. This grand strategy RTS stands out with an evolving artificial intelligence that gets smarter every year, deep hacking and fleet customization systems, and the rare combination of accessibility for casual players and extreme depth for experts.

AI War 2 is a grand strategy/RTS hybrid that reverses many of the conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground. It's also "a sequel to \ enormo-space RTS AI War, which we called 'one of this year's finest strategy games' back in 2009" (Tom Sykes, PC Gamer)

The most devious and acclaimed artificial intelligence in strategy gaming evolves.



Most recent is 2021's Paradigm Shift (which has overviews and tutorials in that link). Every year since 2018, this AI has become more devious -- and the factions facing it, subordinate to it, or simply neighbors with it grow more numerous and more lifelike.

The premise is simple: you've already lost the war. The entire galaxy belongs to other factions, mostly the AI. You are starting with one small planet in a sea of hostile territory, and you must endeavor not to draw too much notice from the AI. Your job is to carefully evaluate targets, strategically expand your territory just enough to run your fleets and defensive networks, and then strike at the heart of the AI(s) when you are ready.

AI War 2 is meant to be both accessible and deep. Early 2021 has seen major improvements to make the midgame easier to get into for new players, plus a more forgiving Science system and a much more powerful Hacking system. Q3 2021 is going to introduce a new Expert mode for those who want the more extreme sort of challenge that comes from having elements of permanent loss, more reasons to hold disadvantageous positions, and so on. Which mode you choose to play will always remain a personal choice.

Unexpected Technical Advancements



In the twelve years since we coded the first AI War, we've made a lot of improvements to our simulation engine, which is now running on top of the Unity 3D engine. However, AI War 2 has presented some truly unique technical challenges, mainly involving running insane amounts of AI and simulations in a massively parallel fashion. We've been able to harness the power of modern multi-core processors to a degree that most game simulations cannot, and our challenge from 2020 onward has been to bring that into the multiplayer realm. While multiplayer currently remains in beta, it is also a bit of a technical showcase.

Mod support is heavily embraced by this game, and having mods be multiplayer-safe (or have deep access to change parts of the core simulation in general) is not typical for games as a whole, let alone this genre. We've managed to make multiplayer a self-repairing affair, which is beneficial both for playing with friends on different OSes and hardware, and for having most mod-code mistakes be corrected by the core game.

The AI has dramatically improved in intelligence every year since 2018, and your framerate is also decoupled from your simulation performance. You can have a great machine with 120fps during heavy battles, and a friend at 30fps and you both stay in sync and the actually simulation doesn't slow down. You can speed up and slow down the simulation without any extra load on your CPU, which is very helpful to avoid any boring waiting around, and you can pause at will.

The interface respects your time by automating things that you would do the same 95% of the time anyway. For that other 5% there are indeed advanced features such as placing spy nanites, tweaking or disabling the rules of automation, or redesigning your fleet compositions as much as you want. Hacking is one of the most interesting ways to customize your existing fleet leaders, as you can give them unusual upgrades or even transform them into new versions of their class.

Streamlined, yet deeper.



Sometimes when a sequel says it's "streamlined," it can really mean "dumbed down." And there are indeed fewer tiny choices to be made in some areas here: you don't have to decide how to wash each dish; you have a dishwasher. And it's a good thing you do, to be honest, because the rabbit hole of complex and confounding scenarios goes as deep as you want it to.

If you want to play at a level approaching Expert, you'll need that spare brainpower to design your fleets, manage multiple fronts at once, juggle offense and defense, and continually revise your empire design to suit your needs as the campaign unfolds. If you want to play more casually, that is absolutely okay as well, and the game can be much more forgiving while still providing a lot of interesting macro choices.

There's too much to memorize (but tooltips are always right there, anyway), and there's always an unfamiliar element. Clicking fast won't help you. To win the AI War, you'll have to improvise, adapt, and use your wits.

As it should be.

How About Some Highlights?

  • Many optional factions, each with their own goals and strategies, create a living galaxy.
  • The fleets system gives you tons of ships that can be organized and distributed with a minimum of fuss.
  • Science upgrades are simple to manage, but provide many options on how to approach any given campaign based on your preferences and what you find in the wild.
  • Hack the enemy, hack your allies, hack yourself. Hacking points are limited, but extremely powerful ways to get more ships or capabilities, directly weaken enemies, or even steal from enemies.
  • A ton of map types, and with a lot of sub-options to make them even more varied.
  • Outguard can be hired as a way of deploying surprise mobile forces whever you need, and many factions can be allies.
  • Warden, Hunter, and Praetorian Guard sub-fleets of the AI provide for new challenges (and sometimes opportunities) in how both you and the AI interact with each other.
  • Crazy moddability, with many levers available in easily-accessible XML. A number of player-supported mods are shipped directly with the game (defaulting to off) so that you always have the latest version of them and don't have to hunt for them to download them.

What's New Compared To The Original?


  • More approachable gameplay, but with a rabbit hole that goes as deep as ever.
  • More to do, in terms of moment to moment gameplay and choices. More to find, more to conquer or be conquered-by.
  • Polished gameplay mechanics, representing everything learned from first game’s six expansions (plus three years of development on this sequel).
  • Trimmed fat: repetitive boring tasks have been automated or streamlined, but more options than ever have been added for you to customize things when you want to. Our goal is never to waste your time, but always have an array of interesting challenges for you to pursue at once.
  • Redesigned UI that gives you a ton of information and power right when you need it.
  • 1.5 hours of new music added to the 4.5 hour included score from the original game.
  • Multithreading for modern performance, and a codebase that will not summon an elder god (recoded from the ground up for modern rigs).
  • Over 1900 lines of spoken dialogue from more than 25 actors.

AI War 2 — game info

Platforms
Windows, macOS, Linux / SteamOS
Steam Deck
Playable
Player modes
Single-player, Online co-op, LAN, Cross-platform multiplayer
PC Game Pass
Not included

DLC & expansions

🎁 Complete the collection

Base game + 3 of 3 DLC at today's best prices.

$28.41
to own everything

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Aug 17, 2026
AI War 2 is a true masterpiece of design, one of the most impressive games ever created. In particular, it is a more board gamey take on a 4x grand strategy game. If micromanagement and meaningless but necessary decisions bother you, but you love optimization, this game will be for you. Also look at this game if you want to be able to have huge-feeling campaigns over the course of just a few hours. If you like tactical decisions, it's probably not for you. There are tactics involved, especially in creating a tower defense or selecting an effective roster of ships, but the main way you will handle combat is by putting all of your ships into one or two blobs and slamming them into the enemy. Its mechanics are a bit odd, but they are genius. This changes if you add expansion content, but by default, you are an insurgency, trying to grow strong as efficiently as possible, because every action you take makes the AI stronger as well. You will never be as strong as the AI, but you can become strong enough to topple its homeworlds, before it truly focuses on eradicating you. The opponent you are facing is designed is completely transparent in how it functions, once you are familiar with…
4 found this helpful
Not recommended Sep 2, 2026
This game is conceptually interesting but its insanely overwhelming as it throws everything at you all at once. There are tutorials but if you take a break and forget anything you're going to be completely lost the second you boot up a skirmish and be completely overwhelmed by everything that's going on all at once. I got this after playing Heart of the Machine and I was impressed by the way HotM eases you into its complexity with narrative guiderails that aren't completely restrictive. AI War 2 is nothing like that at all it throws you straight into the deep end.
Recommended Aug 31, 2026
name feels stilted but gameplay is gripping. runs great and really does feel like you are 5 guys with AKs against the world (good)
Recommended Aug 24, 2026
Most unique 4x game I've ever played.
Not recommended Aug 18, 2026
Hello and welcome to a review of AI War 2 in 2026 . If you can't be bothered to read tldr 5/10 . - the Good - 1) Solid ghimic with the AI enemy in every match 2) Loads and loads of ways to play 3) Ingame mods 4) Advanced map generation 5) Quite a few of minor factions 6) Reasonably cheap from key selling sites with all the dlc - the Bad - 1) Game is just dead . no community whatsoever this game has like 20 players 24 hour peak . 2) This is a sort of result of the previous point but because nobody plays this if you want to get into it its extremely hard since there are no resources online for this game at all , nevermind tutorials / guides . 3) Very Overwhelming . While not as overwhelming as maybe stellaris for an rts game the skill floor is through the roof , especially compared to age of empires and starcraft . - the Ugly - 1) UI is ...... very meh . 2) Even if you do get into it then the average campaign will still take you almost civilization levels of time . 3) Pathing is functional but it is clear that it had to be partially sacrifised to compensate for so large systems . - Conlusion - This is definitely worth …
Recommended Aug 13, 2026
Good Yes

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