#AgentHiggs2
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testtubegames.com
It's time for Antimatter!

That's right, Chapter 3 of Agent Higgs 2 is out now - with everyone's favorite antiparticles. So long as your favorite antiparticles are positrons, antiprotons, or antineutrons.

(The rest are on their way, fear not. Or fear?)
#AgentHiggs2
testtubegames.com/higgs2.html
Menu screen showing a large thumbnail button depicting a cartoon explosion with tile-like particles coming off of it: electron, positron, photons, protons, neutrons -- and also Agent Higgs and a mysterious character. Title: Chapter 3, Antimatter. Subtitle: Let's hope those are safety glasses. Cartoon trading card with header saying "What happened?!" The title is Annihilation I, and it shows a screenshot from the tile-based game of an explosion with two photons zipping away. The description reads: When a particle and its antiparticle collide, they release energy. Mass 1 particles explode adjacent boxes. Below that, a section titled Sticky the Stickler Says, with text: Why would the boxes break? Those photons just zoom off. Screenshot of a level in Agent Higgs 2, with lots of wooden crates around. There is one electron, and three positron tiles. Higgs is at the bottom of the level. A mysterious character says: Antimatter. It's exactly like matter... but opposite in every way.
November 2, 2026 at 5:24 PM
testtubegames.com
Working on the character art, and suddenly felt unsettled about Sigma Four...
#AgentHiggs2
Five panel comic. 1. A happy character with wide unyielding eyes says: Why would I deceive you? There's no, there's no reason for me to do that. 2. A tired looking character says: Okay. All right. Okay. Good chat. 3. Tired character says: You're being real right now? 4. Happy character says I'm always being real. 5. Happy character staring more, without text.
September 29, 2026 at 7:58 PM
testtubegames.com
So, yeah, there are many periodic tables.

But *this* one is mine.

(Well, in the fiction of the universe it's drawn by Sigma Four, so the real credit for design belongs to them I suppose.)

Just some encouragement out into the universe: Keep creating.
#AgentHiggs2
Periodic table poster in a very rainbow glittery style. Bubble letters at the top write out Periodic Table of Elements. It looks like you'd find it in a Lisa Frank trapper keeper. At the bottom it says: Presented by the Sigma Council.
September 28, 2026 at 4:06 PM
testtubegames.com
Out now! Chapter 2: Nucleus.

Neutrons, nuclear forces, and just for good measure, holes in the floor. Looks like these levels are (sunglasses) con-fusing. Good luck!

testtubegames.com/higgs2.html
#AgentHiggs2 #NoAI
Screenshot of a game menu screen titled Chapter 2 Nucleus. Underneath is a large thumbnail button with a grid of tiles, including Agent Higgs, a couple holes in the floor, and four protons and neutrons connected by heart shaped pions. The tagline underneath says: Stick together through thick and thin. Under that are buttons for Basic, Challenge, and PhD levels. Level in Agent Higgs 2 titled Nucleus 9. Two neutrons and a proton connected into a nucleus, one neutron off to the side alone, and an electron in the top. A mysterious character says: The nuclear force makes an unbreakable bond. ... or not? Level in Agent Higgs 2 titled Nucleus 12. There is a whole area in the lower right that's a hole, with Higgs perched in the hold on a small floor tile. In the upper left are four neutrons and four protons. A mysterious character says: Wow, Higgs, you really live life on the edge! Five blue characters in room with some sort of red alarm light across it, and varying expressions on their faces, ranging from scared to excited. In the middle, a bored looking character says: Here we go again...
September 26, 2026 at 2:10 PM
testtubegames.com
The joys of making a game with a level editor: I don't need to make all the levels!

And now with the game out, it's fun to see some examples coming in. Here someone on Steam built a level called Tower of Hanoi, which I can verify takes a *very long time* to complete.
#AgentHiggs2
Screenshot of a cartoony grid based game with crates scattered around. There's a red H Agent Higgs, and in this case a 3 by 3 clump of electrons and protons in the lower left corner - they look like they'll attract together and be hard to separate.
September 3, 2026 at 6:44 PM
testtubegames.com
Ed tech - gotta love it!

And by that I mean you are contractually obligated to love it.
#AgentHiggs2
testtubegames.com/higgs2.html
A cartoony UI screen titled mocc module 1, and electric. Under is a cartoon sigma three saying to someone off screen: do I have to read the next part? They reply: it’s a great line! A cartoony UI screen titled mocc module 1, and electric. Under is a sad looking cartoon sigma three saying: why learn from teachers when you can learn from… a subscription-based service?
September 2, 2026 at 11:34 PM
testtubegames.com
Please, Sigma Three, we're trying to inspire a generation of physicists!
#AgentHiggs2
testtubegames.com/higgs2.html
Two cartoon characters that look like little blue sigmas talking to one another. The fun looking one says: Now that we've discovered all the particles, what do we do for fun? The dour one say: Who said particle physics would be fun?
September 2, 2026 at 5:22 PM