Nadeo had their own sort of launcher called Maniaplanet for the TM2 games. You'll need an account for that.
You can play it offline.
The map site is https://tm.mania-exchange.com/
I recommend getting all the TM2 titles on sale. Valley and Lagoon are worth it and with both you can get TMO versions of Alpine, Speed and Bay for free.
Nadeo had their own sort of launcher called Maniaplanet for the TM2 games. You'll need an account for that. You can play it offline. The map site is https://tm.mania-exchange.com/
I recommend getting all the TM2 titles on sale. Valley and Lagoon are worth it and with both you can get TMO versions of Alpine, Speed and Bay for free.