The Elder Scrolls II: Daggerfall

Daggerfall sends you to the Iliac Bay on a mission from the Emperor, into one of the largest game worlds ever made: thousands of towns and dungeons, factions to join and a story with several endings.

Bethesda released it as freeware in 2009. Most players today run its data with Daggerfall Unity, but it also installs and runs in DOSBox.

How to set it up

1. Install DOSBox Staging or another DOS emulator.
2. Unzip the download into a folder of its own.
3. Start DOSBox Staging and type mount c "<folder>\DFInstall", then mount d "<folder>\DFInstall\DFCD" -t cdrom, where <folder> is where you unzipped the download.
4. Type d:, then INSTALL.EXE, and install the game to C:\DAGGER.
5. Type c:, then cd dagger, then DAG213.EXE to apply the final patch.
6. Type DAGGER.EXE to play. Keep the d: mount whenever you play, because the game reads from the CD.