There was no hyping of tribes gameplay. A jetpack doesn't make a game a rip off of tribes unless all the weapons, movement, environment were the same. Jetpacks existed in games before tribes and the way the jetpack is used in Reach is totally not the same. The whole multiplayer for Reach doesn't look nothing like tribes. The jetpack is just one of many armor attachments that separate your character from everyone else.
Sometimes I wonder if some of you have ever played tribes if you think Reach is copying the game.








