Try testing them in Mini vMac.
Some *really* old apps and games won't even run on a Plus, let alone a SE.
You can start up without MultiFinder. Go to the Special menu and choose Set Startup...
In that DLOG, you can have the Finder alone, or MultiFinder. Originally it was meant to start up with a specific app/game with no Finder at all (for low memory purposes). When you quit said program, the Finder would then load. IIRC there was a Quit feature you can have in 7.0/7.1/probably 7.5 that let you quit the finder, but not the same thing as not loading it in the first place unless you used something like NoFinder or putting something else named Finder in the System Folder. Also -- the MiniFinder app found in pre-System 6 (pluck it out of System 5.1, you'll use the Set Startup feature, which will "enable it", then go to the full finder and extract it from the System Folder) will work with System 6.
To restore MultiFinder if it was not loaded up on startup, simply Cmd+Opt+double-click the MultiFinder icon in the System Folder.
Some *really* old apps and games won't even run on a Plus, let alone a SE.
You can start up without MultiFinder. Go to the Special menu and choose Set Startup...
In that DLOG, you can have the Finder alone, or MultiFinder. Originally it was meant to start up with a specific app/game with no Finder at all (for low memory purposes). When you quit said program, the Finder would then load. IIRC there was a Quit feature you can have in 7.0/7.1/probably 7.5 that let you quit the finder, but not the same thing as not loading it in the first place unless you used something like NoFinder or putting something else named Finder in the System Folder. Also -- the MiniFinder app found in pre-System 6 (pluck it out of System 5.1, you'll use the Set Startup feature, which will "enable it", then go to the full finder and extract it from the System Folder) will work with System 6.
To restore MultiFinder if it was not loaded up on startup, simply Cmd+Opt+double-click the MultiFinder icon in the System Folder.