I mean, there's a level of "pick up and play" you want with the game. You don't want to make it too hard. But I'm sick of everyone running around using dual shotguns, dual pistols, or no-scoping me across the map even though they never hit me. The game is so frustrating.
Oh, yeah, the online is so easy to die. I'm not that big into that anyway because it is hard to find friendly people instead of obnoxious jerks. I am more of an offline / single player guy unless it is a game I am playing with people I actually know online.
I don't know how correct this list is, but here are some demos:
1. Blacksite Area 51 - (Status: Up on PSN now)
2. Ratchet and Clank Future: Tools of Destruction - (Status: Up on PSN now)
3. Stranglehold - (Status: Up on PSN now)
4. Skate - (Status: Up on PSN now)
5. Jericho - (Status: Up on PSN now)
6. FIFA 2008 - (Status: Up on PSN now)
7. Uncharted Drake's Fortune - (Status: Up on PSN now)
8. Dark Sector - (Status: Up on PSN now)
9. Haze - (Status: Up on PSN now)
10. The Club - (Status: Up on PSN now)
11. Sega Rally Revo - (Status: Up on PSN now)
12. Kane and Lynch - (Status: Up on PSN now)
13. Killzone 2 - (Status: Up on PSN now)
14. Bladestorm: Hundred Year War - ( Status: Up on PSN Now)
15. Conan - (Status: Up on PSN now)
16. Burnout Paradise - (Status: Up on PSN now)
17. Fatal Inertia - (Status: Up on PSN now)
18. Devil May Cry 4 - (Status: Up on PSN now)
19. Pixel Junk Monsters - (Status: Up on PSN now)
20. Final Fantasy XIII - (Status: US Demo to be new, downloadable.) Link Link 2 Link 3 Link 4
21. Echocrome - (Status: Up on PSN now)
22. Siren: New Transition - (Status: Up on PSN now)
23. Iron Man - (Status: Up on PSN now)
24. Bourne Conspiracy - (Status: Up on PSN now)
25. Race Driver: GRID - (Status: Up on PSN now)
26. Battlefield: Bad Company - (Status: Up on PSN now)
27. Star Wars: The Force Unleashed - (Status: Up on PSN now)
28. Fracture - (Status: Up on PSN now)
29. Alone in the Dark - (Status: Up on PSN now)
30. Civilization Revolution - (Status: Up on PSN now)
31. PixelJunk Eden - (Status: Up on PSN now)
32. Naruto: Ultimate Ninja Storm - (Status: Up on PSN now)
33. Sonic Unleashed - (Status: Up on PSN now)
34. Soul Caliber IV - (Status: Up on PSN now)
35. The Agency - (Status: A demo is being made)Link
36. Ferrari Challenge - (Status: Demo is being considered) Link
37. Madden NFL '09 - (Status: Up on PSN now)
38. Mercenaries 2: World In Flames - (Status: Up on PSN now)
39. FIFA09 - (Status: Up on PSN Now)
40. Heavy Rain - (Status: Demo coming) Link
41. MotorStorm: Pacific Rift - (Status: Up on PSN now)
42. Warhawk - (Status: Up on PSN now)
43. Pure - (Status: Up on PSN Now)
44. Guitar Hero: Areosmith - (Status: Up on PSN now)
45. BioShock - (Status: Up on PSN now)
46. Mirror's Edge - (Status: Up on PSN now)
47. Eternal Sonata - (Status: Up on PSN now)
48. Valkyria Chronicles - (Status: Up on PSN now)
49. Age of Booty - (Status: Up on PSN now)
50. Metal Gear Solid 4: Guns of the Patriots - (Status: Up on PSN now)
51. Resident Evil 5 - (Status: Up on PSN now)
52. Deadspace - (Status: Up on PSN now)
53. Skate 2 - (Status: Up on PSN now)
54. F.E.A.R. 2 - (Status: Up on PSN now)
55. The Wheelman - (Status: Up on PSN now)
56. Tom Clancy's H.A.W.X. - (Status: Up on PSN now)
57. Yakuza 3 - (Status: Up on Japanese PSN now, US version unlikely?)Link
58. Chronicles of Riddick: Dark Athena - (Status: Up on PSN now)
59. inFAMOUS - (Status: Up on PSN now)
60. Command and Conquer: Red Alert 3: Ultimate Edition - (Status: Up on PSN now)
61. Rag Doll Kung Fu - (Status: Up on PSN now?)
62. Red Baron Arcade - (Status: Up on PSN now)
63. Red Faction: Guerilla - (Status: Up on PSN now)
64. UFC 2009 - (Status: Up on PSN now)
65. Fight Night Round 4 - (Status: Up on PSN now)
66. Marvel Vs Capcom 2 - (Status: Up on PSN now)
67. Need For Speed: Shift - (Status: Up on PSN now)
68. X-Men Origins: Wolverine - (Status: Up on PSN now)
69. Zen Pinball - (Status: Up on PSN now)
70. Red Faction: Guerilla (Multiplayer demo) - (Status: Demo was suppose to come May 21st) Link
71. Ghostbusters - (Status: Up on PSN now)
72. Darksiders - (Status: Demo coming out before release of game) Link 1
72. Maden 10 - (Status: Up on PSN now)
73. Singularity - (Status: Demo coming at some point) Link
74. Uncharted 2 - (Status: Up on PSN now)
75. Tales of Vespira - (Status: demo out in Japan, later for US?)Link
76. Fuel - (Status: Up on PSN now)
77. Katamari Forever - (Status: Up on PSN now)
78. Batman: Arkham Asylum - (Status: Up on PSN now)
79. Punisher: No Mercy - (Status: Up on PSN now)
80. Shatter - (Status: Demo in the works) Link
81. Fight Night Round 4 second demo - (Status: Up on PSN now)
82. Mini Ninjas - (Status: Up on PSN now)
83. Brutal Legend - (Status: Up on PSN now)
84. Borderlands - (Status: No demo before launch)Link
85. WET - (Status: Up on PPSN now)
86. RAGE - (Status: Demo possible) link
87. Beyonetta - (Status: Demo being made) Link
88. LittleBigPlanet - (Status: Up on PSN now)
89. Ninja Gaiden 2 - (Status: Up on PSN now)
90. Lost Planet 2 - (Status: Up on PSN now
91. God of War 3 - (Status: Demo coming to Japan store due to inFAMOUS promotion)Linklink 2
92. Critter Crunch - (Status: Up on PSN now)
93. Dante's Inferno - (Status: Demo coming next week) LinkLink 2
94. Bayonetta - (Status: Demo coming in two weeks) Link
95. Gran Turismo 5 - (Status: Demo coming December 17th) Link
http://www.psu.com/forums/showthread.php?t=96845