TROJAN in new indie-game on Steam!

Still, 4/56 on VirusTotal, with none of the trusted labs like Kaspersky flagging it, means a false positive. Not to mention that you cannot remove an actual virus simply by deleting a temp folder. This is not 1995.
Most likely you had a stuck process from the game or it ran some libraries that hogged the memory.

Создал тему на ресурсе одном, думаю в скором времени банан дадут игре и разрабу.

Дак, да. Уже с первых минут стали писать "ТЫНИПАНИМАИШЬ ЭТА ГАЛАВАЛОМКА111" и заминусовывать обзор, + угрозы в вк от друзей разраба, и всплыл откуда-то чел который указан был в админке группы, мол "я ваще не при делах" %)) Сейчас вот из минуса в плюс вышел лог вирустотал о_О

Исправиться когда гринлайт уберут и оставят только модеруемые. Т.е. Сам валв или еще кто-то примет что игра годная и его стоит запустить в стиме.

It's not possible to decompile and reverse-engineer every single bit they host on their servers. You can't really develop a system that automatically does that either, as there would be far too much false positives. The only way to fight with that apart from licenses and terms that explicitly say you can't upload malware, is to hire actual humans that would evaluate every single game on virtual machine, and in addition to that have specialized knowledge of how to detect malware being executed.

Since Valve can't even hire monkeys for their support team, I'm ALMOST SURE that nobody looks into this, and if they do, those are very small exceptions that are made probably after getting signals from customers, never before. Greenlight malware only proves that, I doubt anything changed since then.

Of course, you could in theory just run all of the files through a scanner, but let's be honest - scanners detect only known malware, and nobody would put a detectable and known backdoor in his title. If I was about to put a backdoor in ASF, I'd code it myself and nobody would know about it until it's too late.

Game very cheap, you can check myself

Well I bought it and scanned with Malwarebytes found nothing.

But when I uploaded to Virus Total found 5/55 : https://www.virustotal.com/en/file/32944ef8d4c0966c01482c9bef792b5d515a678a602b77a0f7d4648d42cdfcd2/analysis/1478773212/

You know, if I'd seen 4/56 on well-known and wide-used software - I would think it's false positive. But in case of some crappy-cheap-gl-game... I would not be that sure. Even if not intentionally - those type of developers could just have their workstation infected.

use a service like sendspace.com

Okay. This might be more difficult than I though.
TRID resulted in 83% InstallShield, but it's not InstallSHield (I ran it in VM). Weird...
Tried 7z, but segments are messed up, tried exeInfoPE and ripped one DLL that is "MMFS2" (can't find what is this).
I5comp returned it's not InstallShield nor CAB/SFX
I opened it via IDA, it has extreme amount of exports
I'm going to open it up now with sysinternals Process Monitor (Pretty neat tool)

You don't seem to understand. The MMFS2.DLL is the only part of the game flagged as "malicious" or "suspicious". The file by itself is on many AVS for a year+ now because it is obfuscated and has lots of privileges -- it's a false positive. It's in every game compiled with Clickteam Fusion 2, specifically Clickteam Fusion 2.5 Free.

If your computer went slow after running this game, it's likely because the developer is not as good as he thinks and released a game with persistent issues (memory leaks, shoddy tmp file handling, wild processes, etc).