rFactor (1 & 2) are paid sims — no free online version exists.
| Game | Platform | Model | Notes |
|---|---|---|---|
| Assetto Corsa | PC | Paid ($10–20 sale) + free mods (Content Manager, CSP, tracks, cars) | Best modding, huge community |
| RaceRoom Racing Experience | PC | Free-to-play (core), pay per car/track | Official DTM/WTCC licenses, good physics |
| Automobilista 2 | PC | Paid ($30) | rF2 engine, South American focus, excellent |
| iRacing | PC | Subscription ($13/mo + cars/tracks) | Most competitive, structured, expensive |
| Live for Speed (LFS) | PC | Free demo (3 cars, 1 track) / £24 full | Legendary physics, tiny install, active |
| KartKraft / SuperTuxKart | PC | Paid / Free (open source) | Karting fun |
Best Free Start: RaceRoom (download, drive 3 cars free) or LFS Demo. If hooked → Assetto Corsa on sale + Content Manager = endless content.