TeeWorlds : Between the facts that you cannot have a ping lower than 200 in any server, the COMPLETE LACK OF SENSICAL PROJECTILE PHYSICS, the nerfed-beyond-belief shotgun, and everyone else having a magical internet connection that runs on faries allowing them to have a ping of 50, you cannot actually play the game well unless you feel like wasting a few hours getting used to 0.2 seconds of delay and bad physics(actually a total lack, but whatever).
Also the completely handicapped katana weapon that makes the wielder faster(harder to hit) and gives them a dashing attack(even harder to hit and hard to dodge) that does 100% damage or something close to it.