Actually, it fits on a single 1.44 meg floppy. Two if you want sound. What I have done is take the C-Evo installed files, remove the AI development kit (this is only useful if you're both a Delphi developer and have interest in developing an AI for C-Evo), and split off the sound. I then made two files; the core C-Evo game that is perfectly playable, albeit without sound, which compresses in to a 1,384,627 byte 7-zip file, and a file with all of the sounds for C-Evo, which compresses in to a 924,045 byte file.
If you need 7-zip to decompress C-Evo 1.1.1, that will also easily fit on a single floppy. Who needs CD-ROM drives anyway?
Speaking of floppies, the last version of Slackware that could be entirely installed from floppy was Slackware 3.4 from 1998; the last version of Slackware that could have the base system and networking utilities installed from floppy (installing the rest over the network) was Slackware 7.1 from 2002. A base Slackware 2.1 system (1994) fit on four floppies; the entire system only used 70 floppies. Yes, I remember, back in 1995, giving my roommate an entire floppy tray filled with 70 floppies so he could install Slackware on his computer. The base system for Slackware 7.1 needed 16 floppies; at that point it no longer made sense to use floppies any more.
Recently, an artist made artwork showing you would need hundreds of floppies to fit a modern Photoshop install. But, good software doesn't need that bloat. C-Evo shows that a compelling and addicting game can nicely fit on a single floppy; MaraDNS can also easily fit on a single floppy, complete with source code.
Zillions of Games can also easily fit on a single floppy; I have a version thats 400k in size that supports Chess and a couple of Chess variants (notably Capablanca chess). The majority of the space in the 20 meg install file for Zillions is for all of the graphics for all of the abstract games supported by Zillions.
Some other games that easily fit on a single floppy: Cultivation, Andy Noble's remakes of classic games
For people who want to look at the files showing C-Evo 1.1.1 on a floppy, go here: