The problem with this game is everything feels slow and sluggish. The movement, aiming, crouching, walking etc. feels slow and lurch. You need to add sprint and up the walk speed. You need to make aiming and crouching faster as well. You need to make playing aggressive a more viable option. Also make PTP people less powerful and fix the interface a bit, maybe interface tutorial (if there was one I skipped it)
Great classic game with cool music. I was having fun killing everything then came another 1 way dungeon where I got stuck and I left this game never to be seen again.
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You shouldn't be able to get stuck. Did you try the walkthrough?