Interloper is an online multiplayer real-time strategy game with matches that take only 5 minutes. Instead of destroying your opponent, you win by claiming domain. By predicting your opponent's movements, you corner them to claim the entire map.
User reviews:
Very Positive (197 reviews) - 88% of the 197 user reviews for this game are positive.
Release Date: May 21, 2015

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Recent updates View all (20)

August 7

Interloper Libraries Update! (Gold 1.1.2)

- We've built a latest version of the Lidgren library for networking, which might resolve some connectivity issues (no issues targeted in particular, just the hope that a newer build is more stable).

- We've built the latest version of FNA for the OSx and Linux builds. This might help with the OSx retina display bug where your cursor is completely offset from your ingame cursor. I don't have a retina Mac myself, so if anyone could confirm/deny this that would be great :)

4 comments Read more

May 25

French Translation! (gold 1.1.1)

A French translation was made by Celine Fuckin' Dion and we added it to the game! :D

Amusez vous bien!

0 comments Read more


“Looks fantastic, plays fantastic.”
Rock Paper Shotgun

“Interloper might be the RTS to help people cross over that gap, from complexity to simplicity.”
Kill Screen

“Interloper is an RTS on speed. A micro-sized distillation of the genre, its matches are meant to last about five minutes.”

About This Game

Interloper is an online multiplayer real-time strategy game with matches that take only 5 minutes. Instead of destroying your opponent, you win by claiming domain. By predicting your opponent's movements, you corner them to claim the entire map.
Interloper distills RTS mechanics to their essence, bringing a focused, stripped down, fast-paced, and accessible strategy experience.


• Fast-paced strategy that’s easy to learn, hard to master.
• Short, intense matches taking no longer than 5 minutes.
• Compete in online multiplayer, or against AI of various difficulties.
• Extensive singleplayer content revealing the depth of the game.
• View replays of other player’s matches and upload your own.

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Windows XP
    • Processor: 1GHz
    • Memory: 1 GB RAM
    • Graphics: Support Shader Model 3.0
    • DirectX: Version 10
    • Network: Broadband Internet connection
    • Storage: 300 MB available space
    • Sound Card: DirectX 10 compatible
    • Additional Notes: Uses XNA HiDef
    • OS: Mac OS X v10.8 Mountain Lion
    • Processor: 1GHz
    • Memory: 1 GB RAM
    • Graphics: OpenGL 3.0 support (2.1 with ARB extensions acceptable)
    • Network: Broadband Internet connection
    • Storage: 300 MB available space
    • OS: glibc 2.15+, 32/64-bit. S3TC support is NOT required.
    • Processor: 1GHz
    • Memory: 1 GB RAM
    • Graphics: OpenGL 3.0 support (2.1 with ARB extensions acceptable)
    • Network: Broadband Internet connection
    • Storage: 450 MB available space
Customer reviews
Customer Review system updated Sept. 2016! Learn more
Very Positive (197 reviews)
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107 reviews match the filters above ( Very Positive)
Most Helpful Reviews  Overall
29 of 33 people (88%) found this review helpful
3 people found this review funny
1.3 hrs on record
Posted: May 21, 2015
If you want a fun and easily approached RTS, I definitely recommend it. The art style and sound design really bring you in while the simple mechanics get you involved.

When you take that all in and add in the short matches, amazing depth of play, and included multi-player, you get a good package.

Click here to see it in action --> Gameplay Footage

I tend to consider it like real time chess with a biological theme.

Also, the drones look like scifi war sperm. What's not to love? :D
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23 of 24 people (96%) found this review helpful
1 person found this review funny
6.1 hrs on record
Posted: August 31
Product received for free
Interloper is a fast paced real-time strategy game that features stunning visuals and very simple mechanics. The only objective of this game is to claim more territory than your enemy.

You can play in singleplayer (single match or campaign) or multiplayer. However, there isn’t enough players online so, unfortunately, multiplayer is basically dead.

During the campaign there will be a tutorial to teach you the mechanics of this game:
- your goal is to conquer 75% of the territory in the map. To achieve that you control a sentinel. You claim territory by moving it to unclaimed areas or enemy territory.
- although, sentinels cannot fight, they can claim assemblers which produces drones. These can fight enemies’ drones. To produce drones a power source is needed.
- drones can be upgraded, through foundries, to stronger units - Specialist Units- such as Snipers, Defenders or Destroyers..

Despite multiplayer being dead, I still recommend this game since it does not overstay his welcome: the mechanics can be learned easily and all matches are fast and end quite quickly (they usually don't take longer than a couple of minutes).
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23 of 25 people (92%) found this review helpful
1.2 hrs on record
Posted: May 22
To tell you guys the truth, I wasn't expect any good from this game in the frist place. In fact, I added Interloper to my wishlist and removed it soon, just because I thought "nah, this game doesn't looks like promising enough. I've got enough games refunded already so I'm not gonna take another wlid shot".

And of course I'm terribly wrong.

So where do I start with? This game is indeed a fast-paced strategy game, it is fast enough to complete a round within 5 minutes. It is kinda casual-ish, It won't take long to finish a round, nor have yourself an epic bloody battle for a couple hours. It does has simple controls, but the strategy is still required. You will need to make a plan, fast, like figure out what you're gonna do for this whole round in half a minute right after the start of the game, otherwise, you might lose, and the reason is you got blocked in a corner, and by the time you phased out, your opponent had took over all your territory already.

And keep that in mind, I'm not good at RTS, but still I'm having fun in this game. I highly recommend this game, there's a sale anyway so go try it yourself, and hopely have some fun.
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22 of 28 people (79%) found this review helpful
11 people found this review funny
1.6 hrs on record
Pre-Release Review
Posted: May 21, 2015
It's RTS stripped to the bone: no fat, no boring stats and certainly no boring tanks. There ARE giant sperm mice, though.

Review video:

The surprise with this game is how beautiful and relaxed it appears on first contact, but half way into a match you'll be tearing your hair out trying to simultaneously claim new territory, steal back old territory, repairing broken power lines, moving your drones between attack and defence, making more drones etc. A casual glance at gameplay footage won't make you truly appreciate the number of mad calculations you'll need to do every second.

The maps don't vary enormously and there's a finite amount of elements to play with, but then chess only has one 'map' and that game seems to do okay for itself!
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11 of 11 people (100%) found this review helpful
16.4 hrs on record
Posted: July 15, 2015
Fun little 2D "zone capture" that's, as the description states, "easy to learn, difficult to master". Downside: not well known so the multiplayer is not very populated.
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9 of 9 people (100%) found this review helpful
1.0 hrs on record
Posted: November 10, 2015
Quick early review:

Only played 3 matches, but this is a FUUUUN game. It requires tactics and is pretty fast-paced. Lots of micromanagement keeps you on your toes.

More people should buy this game...especially at this price.

As a RTS it's fun and entertaining...pretty much perfect and what I expected. 9/10...deducting a point because the menu on OSX requires a workaround to function. That should really get fixed!
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10 of 11 people (91%) found this review helpful
139.8 hrs on record
Posted: June 26
Name: Interloper
Developer: Monogon Games
Date: 2015
Genre: RTS
Orientation: Multiplayer
Population: Few Who Survived
Perspective: 2D - Top-Down
Timeflow: Match-Based, Fast-Paced
Setting: Molecular
Style: -
Tags: 1v1, Indie, No Campaign, No Story, Simplistic
Model: B2P
Content: Solid
Platforms: PC, Mac
Simple fast-paced strategy game in molecular settings. You control amoeba-like units and yourself as big immortal bulge, which can capture territory and spore-like buildings. Bulge can't fight or die, but it can phase, becoming invisible and moving through units.
There are no resources except power sources, which is necessary for buildings to work. Primitive units can be combined into powerful ones. In total there are only 5 units and 4 buildings, but for such kind of game it is enough I guess - you don't need more tactical depth if you just want to jump into match and kill 5 minutes or less.
The goal is to capture the whole map. There are no different factions (only different colors), and all maps are symmetric. Even on big maps match only lasts several minutes, but is packed with unstoppable action and may make your brain boil. You better make sure all your APM and micro-control skills are sharped and ready BEFORE match begins - after it does, you will only have few seconds to warm up.
The game is multiplayer oriented. But singleplayer skirmish is quite fun too. There are 3 types of AI to choose from: agressive, defensive or balanced. I mainly played against balanced, and damn he is super agressive :O. And even if all AI levels below Expert are not so hard, Expert is ridiculously strong and challenging at big maps. He doesn't put up a fight, he stomps you - analyzes situation better than player does and utilizes weaknesses. And he doesn't even have any handicaps - unless you select them before match for additional challenge. There's no fog of war, map is always open and you can see games are completely fair. This AI is far from using same tactics over and over - though he may start from the same thing, throughout the game he keeps being fluent and adaptive, and doesn't mind loosing something if he sees opportunity to build bigger advantage. That's how you do a good strategic AI :)
There is no campaign and no story or lore or motivation in this game whatsoever. What's called 'Campaign' here is just the tutorial with several missions, and takes less than an hour to complete.
Graphics and design are okay, not disgusting and not too simple for a molecular game. Animation of territory being captured by your bulge is satisfactory as it should be and units look cute :)
The game becomes boring really fast though, as there is not much to do: 13 skirmish maps and when you win on every map once or twice that's just it. Multiplayer was supposed to be the main part - but as for now, 8 average players online and 0.5 average player in queue... With such numbers I shouldn't recommend this game to anyone, but for the AI I will ;)
Overall - good to try, not good to stay for long.

Class: III - Dead Bread
Verdict: Yes
Reviewed: 6.26.2016
Approach: Steam - PC, Steam Beta - PC
Time: Couple Hours
  • 1 Win In Multiplayer
  • 1 Win @ Every Map VS Advanced AI
  • 3 Wins VS Expert AI
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10 of 11 people (91%) found this review helpful
1.2 hrs on record
Posted: December 29, 2015
Really cool game but nobody playing multiplayer. If you can play local or are happy vs AI then this game is very entertaining. If you want to go toe to toe with strangers on the internet look elsewhere.
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12 of 15 people (80%) found this review helpful
9.5 hrs on record
Posted: August 13
What is Interloper?

Monogon Games are the developers behind Interloper that saw its release on 21 May 2016. The game is an RTS in its most pure form. The primary objective of the game is to gain control of each map. There are both single-player and multiplayer modes. Because the game is founded on the most simplistic of RTS rules it serves as a fantastic gateway into the genre. Therefore, if you have ever wanted to play an RTS but have felt uncertain as to whether you would enjoy it or intimidated by the big names then this may be the game for you.


The single-player campaign mode starts with a well-presented and implemented tutorial. The game goes through each of the fundamental mechanics that the game is built upon. It is very thorough while affording the player the opportunity to make mistakes along the way. For each mechanic, there are two levels. The first teaches the player the mechanic with the second making the player put the lesson into action. If, at any time, it seems like you have screwed up you can forfeit and restart the match. There is no penalty for doing this and you shouldn't feel bad if you have to restart once or twice.

Short Rounds

Once you have completed the tutorial it is time for you to discover one of the facts of the game. That is that the individual matches or rounds themselves are only intended to last for approximately five minutes or so. I have seen comparisons of Interloper being the RTS equivalent to Hearthstone. It is primarily in the simplicity of gameplay and the anticipated shortness of matches where I believe this to be most fitting.

This places a significant importance on the opening moves of each round. You can quickly find yourselves in a potential match determining position. The simplest mistake early can have those types of consequences. This is both a strength and a weakness of the game. It is a strength because it rewards players who are able to implement successful strategy immediately. However, it is a weakness because matches tend to go one way or the other extremely quickly. I have yet to see many matches where the player who got out of the blocks quickly didn't end up winning the game. This is in regards to games that I have played myself as well as watched.

Two Weaknesses

There are two very identifiable weaknesses on top of the early gameplay often determining the winner of a match. The first of these is that the game requires greater numbers in online play. Although I enjoyed spending time with the campaign the AI can only go so far. The multiplayer games are fast and furious fun when you can find a match. The other problem that I have with the game is something that can be easily solved. That is that I'd like to see a greater number and variety of maps. There are currently thirteen that can be played with. If this number increased to about twenty that would be fantastic.

Is it Steamified?

Interloper makes fantastic use of Steam's features. There are trading cards (9) and achievements (20). The title also makes use of the Steam leaderboard system. Furthermore, the game also makes use of cross-platform play.


Interloper should appeal to many people. Firstly, f you're a fan of RTS games and don't have time to play those that seemingly take forever to play then the short matches here should appeal. Secondly, if you haven't played an RTS and are unsure as to whether you would enjoy it then you could definitely do much worse than trying your luck with this one. You may just open yourself up to an entire genre that is bursting at the seams with outstanding titles.

For similar reviews and your chance to win great giveaways please visit Steamified.
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9 of 10 people (90%) found this review helpful
1 person found this review funny
4.3 hrs on record
Posted: May 22
+ very innovative game idea
+ finished and working game
+ good casual game, but also great challanges for "hard core gamers"
+ nice graphics and artwork
+ game is simple but offers room for quite some cool winning strategies
- ( small minus) maybe the controls of the units (selection+giving commands) could sometimes be better
? are we getting a lot?

I got it for a big introduction discount and it is definitely worth it. If it is worth the full price you have to decide for yourself. It's a question of how much you get for your money but what you get is very good.
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Recently Posted
[DNA] NotaCucumber!
2.8 hrs
Posted: October 20
The game is absolutly terrible. great concept but impossible to play. its almost impossible to win against the easiest AI on a map that has all sentinals
Helpful? Yes No Funny
1.1 hrs
Posted: September 22
A good starter package for abstract RTS. I got it on a massive sale. The quality is higher than you'd expect but you could have a similiar challenge for free on some of the games at Kongregate.
Helpful? Yes No Funny
1.9 hrs
Posted: September 16
Very well thought out :^)
Helpful? Yes No Funny
I Was Not Here
0.2 hrs
Posted: September 9
Can someone help me here, my game wont play at all, the moment after i chose the level, the game crashes. After a friend of mine told me to try lower the graphics and stuff, i chose a level again, only this time it caused my entire computer to restart. My computer is on windows 10 and has geforce gtx
Helpful? Yes No Funny
2.0 hrs
Posted: August 30
Helpful? Yes No Funny
C Arthur Lane
2.2 hrs
Posted: August 27
It's a pretty game for sure... but I can't help but to think that it this was a phone/tablet game with refined touch controls that this game would be a little better off. I hope that this game will continue to exist as it's an RTS we don't need, but one that we deserve.
Helpful? Yes No Funny
2.0 hrs
Posted: August 26
Gameplay is tedious, I have yet to play a match under 8 minutes, and the linux support is non-existent. It just runs it in WINE. And no, it didn't work for me. I have no choice but to play in Windows.
Helpful? Yes No Funny
9.9 hrs
Posted: August 23
Cool little game, a good concept and graphics. But lacks maps and online public battles don't seem to work.
Helpful? Yes No Funny
0.1 hrs
Posted: August 22
I purchased two copies of this game to play with my son. My copy loads up, but then when I try to start level 1 it crashes every time. My son's copy just won't start.
Two completely different computers (Dell laptop and Vibox desktop) and all our other games are working just fine.
Early access I could almost understand, but this is a launched game.
Helpful? Yes No Funny