My favourite game ever is Flimbo's Quest but running a close 2nd is Trackmania. I play it everyday and have done for more years than I care to remember. I am number 1 in Ireland online in all versions of the game and number 1 in Official Mode on all versions except the oldest one. Unfortunately I'm number two on that but that's ok because the other lad is unreal and brilliant at an environment I am terrible at. There are 12,000 players playing the oldest version in Ireland and 12 million the world over. It has one of the highest user generated content communities in the world. The newer versions aren't as popular but I suspect that is because they are not free. Below is a link to the Creator's Site (Nadeo) where a link to all versions can be found. TM2 Canyon is my best and favourite environment. You can check the Maniazones site for all of the info regarding any country in the world below, starting with Ireland. The newer games have yet to receive a Maniazone site unfortunately. If you play Trackmania and fancy adding me my addy is "intrepid_war", without the commas.
This is me driving a former world record time on Nadeo's B13 Map. It is a 12 second map but extremely difficult to do so.