This game was developed by Robomodo instead of the original Neversoft, but it is still published by Activision. It is more of a highlight reel put together by fans of the franchise than a 100% port of the original. That being said, it is still very much Tony Hawk Pro Skater and has hours of playability.
The base game has seven levels from THPS 1 & 2 (Warehouse, School II, Hangar, Mall, Venice Beach, Downhill Jam, Marseilles), and the DLC adds three huge maps from THPS 3 (Airport, LA, Canada). An awesome feature they used was that they locked all of the levels, making you play and complete the challenges in order to progress to the next stage. The hidden S-K-A-T-E's are all still in their original places, as well as the VHS's, except they have been changed to DVD's.
Purchasing the DLC also adds the ability to revert during combos on all maps, allowing you to carry them for a longer amount of time. Additional content includes four new skaters: Steve Caballero, Geoff Rowley, James Hetfield and Robert Trujillo of Metallica.
Most of the complaints I see are about wonky physics, but the franchise has always had wonky physics. I booted up my original THPS2 on console and it was pretty damn wonky. But that is what added to the fun and charm of the franchise, at least to me. However, there unfortunately are no multiplayer game modes, and there is also no level editor.
Still highly recommended for skateboarding fans and fans of the franchise!