10. The Snow Storm - GTA IV
https://www.youtube.com/watch?v=paooVUHj_3g For the most part GTA IV did a good job tightening up the gunplay and general feel of combat overall - but that didn't stop Rockstar's standard balls to the wall-approach to mission design throwing a million enemies at you and really testing the limits of how much you'd gotten used to everything. It really should've just been an excuse to chew through some enemies, but when you had them all storming in from too many angles to effectively manage, helicopters baring down from above and an entire chase sequence afterwards if you made it out alive on a high wanted level - it just went to show Rockstar might not have learnt as much from the previous generation as they should have.