The modder an_unknown_player just released his recreation of Sonic Roboblast 2 on the Zandronum engine, the goal for v1 was to recreate the Multiplayer portion of the game (specifically SRB2's Deathmatch mode which was renamed to Match). On top of featurs like breakable monitors (jump on them or spin into them to break), new SRB2-ish vhasecam based on "TheArmyGuy's code" and 2 playable characters, Sonic and Tails, a lot of other stuff has already been ported. It's not finished yet as the modder needs some support but just take a look at your own, this is quite interesting and brings the experience to a modern engine.