DESYNC is a pretty good old school FPS, who's perfection is marred by small flaws here and there that do not affect the overall quality of the game, if you know and accept what the game is trying to do.
Pratyush writes- "Are you into hard games? Do you prefer banging your head over and over if you are not able to get through a segment of a game till you bleed out and suffer from irreversible brain damage? Are you someone who thinks that challenge is a justification for existence? Well, for such people like myself, here is a list of a few games that might keep you occupied/entertained if you are looking for some satiating those sadistic needs. These will also cost you less than a meal at a local Dhaba (Restaurant), so there’s that too."
Tom Chick - "If you’re interested in big-budget score-based shootering, Epic re-released Bulletstorm this year. Remember Bulletstorm, which was like The Club, but with marketing? The re-release even has a new set of challenges to flex the gameplay a little. Knock yourself out. But if you’d rather emphasize “score-based” over “big budget” and “marketing”, Desync is your better bet."
The time spent in Desync will be a mixture of sheer frustration, annoyance and that "get in" enjoyment when you score a kill.