Story's in games

Task One: 
1. Bioshock - the game leads you through an underwater paradise, which is over run by mutants. The twist at the end is on the level of M Night Shyamalan.
2. Fallout: New Vegas - You make your character, and choices throughout the wastes of Las Vegas.
3. Tomb Raider (2013) - Resetting the story of the original, showing how the character started out, putting her through hell and back on an island as she try's to save her friends and escape the island.
4. Borderlands 2 - Playing a 'Vault Hunter' who has been hired and almost killed by 'Handsome Jack' you seek revenge and the treasure you were promised.
5. Terraria - doesn't necessarily have a story, however with the bosses and NPC's you find, you create your own story.
6. Portal 2 - Playing as Chell, you wake up in the Aperture testing facility, and are made to go through the puzzle based room's using the portal gun to escape.
7. Warframe - Playing as a genetically altered alien, you must fight your way through the Human armies, and recover lost artefacts that could give you the power to beat your enemies, and revive your once powerful race.
8. Dota 2 - Playing as a wide range of characters, each with their own back story, you fight through the lanes to destroy the opponents Ancient.
9. Infamous - Playing as a courier, who was delivering a mysterious devise, that exploded and gave you the ability to control electricity, you become ether a super hero, or super villain, you rid the city of the different, gangs, and try to survive.
10. Crash Bandicoot - Playing a genetically advanced Bandicoot, created to lead the Evil doctor Cortex's army, you wake up on a beach and go through the stages to beat him and save your friends.

Task Two:
Tetris doesn't have a story, however newer additions and rip off versions add a story to give you a reason to match blocks.
Pong doesn't have a story, but like with Tetris, newer versions, like Ice breakers, added a story to the game play.
Cookie clicker doesn't seem to have a story at first, and to be fair, you don't really need to pay attention to it during the game, but the newspaper headlines, and the upgrades tell a story and its strangely well done.
Minesweeper doesn't have a story, you just put flags over bombs and win.
Worms technically doesn't have a story, it has a story mode, but it boiles down to worms shooting each other for no reason what so ever.

Task Three: 
The difference between story in a game versus a story in a book or film. This is a relatively easy answer, one is interactive and you feel as though, even though it is sometimes scripted, you have the ability to change the outcome. In many games you cant actually do it differently then others and the ending is set in stone, like the CoD series, but there are games like fallout that almost feel like a choose your own adventure book, in which, you can go, steal, kill and do whatever you what, with some limitations of course. With a film and a book, you are going through what someone has already done, you are almost re watching/reading the events of something you don't partake in nor can you change, there is a set path that you must follow. There are some exceptions in film as well, most first person films like 'Cloverfield' and 'The Blair Witch Project'  are filmed in a way that makes us feel there, even though at the end of the day, we are still helpless, which in some respects makes them better, but anyway. Games have the ability to engage us so much easier, as there are an interactive media, where books and films cant really achieve this.

Task Four:
Linear games follow a set path, I personal consider this to be chronologically, like with films, however you could interpret it with linear games following the main quest. These games normally have one goal, that you achieve by the end of the game.
Non - linear games normally go back and forth between ether different times, or missions, or even characters. Things like 'Max Pain 3' where you jump between different stages of Max's life are a good example.
I personally think that most gamers are linear, unless there is some sort of flashback level, or a jump to the end and back. Even things like skyrim, which the rest of my class considers to be non-linear i would disagree. My reason, because it has a timeline in it, you go from day one, through to however long you want, you may want to do a different mission rather than the main one, however you are in the same timeline and as you are the main character, the main quest is essentially everything in the game, as you can deviate as much as you want without the game actually ending.