New
#11
Yeah, the story itself clocks in at around the same amount of gameplay as GTA IV. However, there is a lot more extra stuff to do, lots of collection missions, car stealing, tennis, golf, etc. There are plenty of weird side missions and they are often funny. You can also go to a movie, or spend quite a while just watching television. The soundtrack is decent, but it's not Vice City good either, about par with GTA IV.
Aside from the spaceship parts, there are also letter scraps to collect.
I put in about 60 hours into the game, but I've done a heck of a lot of running around and goofing off as well.
I've done quite a bit, but I've not reached 100% completion either. Here's a list of what you need for 100%:
Complete all story missions, including all assassination missions from Lester.
Get a lap dance at a strip club.
Complete all 5 Street Races.
Complete all 4 Sea Races.
Score at least a Bronze in 3 rounds with each weapon type at the Shooting Range.
Score at least a Bronze in all 12 lessons at Flight School.
Go parachuting. A parachute can be found at the tram station at the Summit of Mount Chiliad.
Participate in golf, darts, and tennis at least once, and enter 3 triathlon races.
Complete all 6 Off-Road Races.
Complete all of Tonya's towing missions with Franklin.
Complete all of Beverly's paparazzo missions with Franklin.
Complete all of Hao's Shift Work mission with Franklin.
Complete all of Barry's missions with Franklin.
Complete all of Fanatic's missions with Franklin.
Complete all 4 of Dom's extreme missions.
Collect and return all 50 Space Ship parts to Omega.
Collecting all 50 Letter Scraps and complete the Dreyfuss' confrontation.
Complete 14 Random Events.
Complete all 25 Under the Bridges.
Complete all 8 Knife Flights.
Complete all 25 Stunt Jumps.
Purchase 5 money-generating properties.
Purchase a vehicle on the web.
Visit the cinema.
Walk and play with Chop.
Hire a prostitute.
Make a booty call to a stripper.
Rob a shop.
Complete 4 friend activities: go to a bar, visit a strip club, watch a movie, and play dart with at least two of the game's protagonists.
Do all that and you'll get 100% completion.