Am I the same person as user sigsegv_banana on HackerOne? No.

I like to analyze TF2 (the MvM gamemode in particular) and figure out exactly how the various parts of the game work. I post walls of text explaining how things work or why things are broken on the SCUD MvM forums; I make videos demonstrating stuff and post them to YouTube; I run tests and create detailed graphs; I figure out things that are buggy in the game, and track down why they don't work; I make mods to fix and tweak various things; and I report bugs to Valve so they can fix them. Sometimes, I find time to actually play the game.

These days, I spend most of my time looking through the TF2 game code (via disassembly, not the actual current source code) to figure out how various aspects of the game work, especially the bot AI. I debug problems and try to come up with creative ways to fix them. I do my best to tell custom MvM mission creators about the types of things that are possible that they may not know about.

I've learned a lot along the way.

Discord ID: sigsegv#5577

The community weapons were a thank-you from the TF Team for submitting lots of detailed gameplay related bug reports. I estimate I've sent them in excess of 100 emails cumulatively with bug reports over the past two years or so.

The first Finder's Fee was for reporting a potential arbitrary code execution exploit in Source engine. The second Finder's Fee was for reporting another arbitrary code execution exploit specifically in Team Fortress 2 (for this one I worked together with PistonMiner and we crafted a working proof-of-concept exploit file that could successfully execute code of our choosing). The third Finder's Fee was for reporting yet another arbitrary code execution exploit in Team Fortress 2 (another collaboration with PistonMiner).

People are constantly sending me Steam invites and leaving comments and messages on YouTube and Reddit asking me to look into things, and it's impossible to keep track of everyone who's asked me questions or requested that I look into something. I just don't have the time to respond to everything, so lots of stuff ends up slipping through the cracks.

Some reliable ways to contact me (for example, if you have something really important to tell me and I haven't gotten around to your friend request, or something):
1. Send a Reddit message to /u/sigsegv__
2. Send a YouTube message via my sigsegv channel
3. Send an email to sigsegv at sigpipe.info

I am usually "offline" on Steam, but you can still send me a Steam message and there's a very high chance I will see it.

In mid-2015, I was really annoyed at the increasing number of bugs in Mann vs Machine mode, so I took it upon myself to set up a dedicated server with a bunch of small server mods to fix various bugs, improve some of the more annoying aspects of the game mode, and generally make an MvM experience that's better than what you'll get on a Valve Mann Up server.

Website: [sigpipe.info] info for connecting and a detailed (but preposterously outdated) list of the installed server mods
Forum thread: posts about updates to mods, discussion about custom missions, etc.

Steam URL for direct connection: steam://connect/mvm.sigpipe.info:27015

1. YouTube: I post TF2 (primarily MvM) analysis videos frequently. Mostly brief, sometimes in-depth.
2. GitHub: [github.com] you can look at the source code for my server mods and other related things.
3. GameBanana: [gamebanana.com] I've made a few client-side improvement mods for MvM.

I used to have some information here, but I've gotten tired of people constantly repeating factually incorrect things about my health situation and personal life. So, kindly knock it off and let me speak for myself on those matters. Thanks.