What's the most fun game that takes the least amount of space?

I hadn't heard of this Atari 2600 frogger clone called Frostbite until relatively recently, but...
https://upload.wikimedia.org/wikipedia/en/d/dd/Frostbite_boxart.jpg
It's really good! Much better than frogger, and very addictive.
Total game size: 3.25KB

That got me thinking... what's the game for each generation and console that packs the most fun per bit?

Quite a few options for the zx Spectrum I can think of:
Light Cycles
Chaos
3D Death Chase
Jumping Jack

Gameboy Tetris was 32 kiB. I think this was the smallest GB ROM size.

NES Zelda was 64 kiB. The programmers famously goofed on the math and used only half of the map size that was available, allowing Miyamoto to put in the second quest.

Is Frostbite small by Atari terms? How big is a normal 2600 game?

Early games on 2k carts but most were on 4k carts unless there was some expensive bank switching going on

Chaos was such a great game :)

Chaos does look cool!

I guess most 2600 games are comparable size-wise but Frostbite surprised me how responsive the game mechanics were -- most 2600 games feel really sluggish.

Any suggestions for the 8bit/16bit era?

1K ZX Chess for the ZX81.

1K ZX Chess's code takes up only 672 bytes in memory

I sorted all my NES emulations by size, and I think this is the coolest one near the bottom:

https://dustmop.itch.io/the-witnes

Rhino Hero.

But that’s a physical box, not megabytes.

tetris gameboy is def my vote

https://www.youtube.com/watch?v=_-_xK8GhMiQ

This little scorched earth type beauty was something me and friends battered the hell out of. I can't confirm the size, but judging by the few sprites and simple gameplay it ain't that big. But tons of fun.

Commodore Amiga btw

Snake II for the Nokia 6310i (with a generous 30kb for OS and everything else) deserves a mention just for being so addictive

this is only 96k! https://m.youtube.com/watch?v=2NBG-sKFaB0

xp yep big fan of tanx. "oooooh now he can't be too happy with that one!"

Not as small as some of these, but Cool Edit 96

I like this entry in this 13K js game competition
https://js13kgames.com/games/choch/index.html

https://thumbs.gfycat.com/WanWeeklyBee-small.gif

I wonder what's the smallest game in the current era that was pressed onto physical media.

apparently sekiro was notably small in filesize, but no idea what would actually be the smallest

there's often limited edition physical media runs of small indie games so Kero Blaster at 20mb is very likely the winner on PS4
https://limitedrungames.com/products/limited-run-130-kero-blaster-ps4