Republik of IL. Handguns with straight cases, any caliber from 30 carbine through 45-70, 444. Bottleneck cases no longer than 1.4", 30 cal....all must have "advertised" muzzle energy of 500 ft-lb minimum. I can't use my 30-30 Contender. I can use my 30 M1 Carbine Blackhawk.
Rifles, centerfire illegal for deer but you can use a muzzleloader with 50 cal sabots and three or more Pyrodex, other fake black powder for deer.
Squirrel, small game, varmints....basically if you can carry it you can use it. No rifles/hanguns on game birds. No slugs on anything but deer and coyotes.
Now for the newest and brightest: feral hogs. Only during deer season if you have a valid deer permit. Otherwise, you are not allowed to shoot feral hogs. You must report them to the DNR who will "take care of it".
For a while, you were not to take coyotes or other varmint/predators from a tree stand. Not sure now.