Save System: At mission completion or by visiting in game bank while no mission is going on.

Review
Pros
1. Good music collection, lot of songs were in GTA 3 too. Reminds me of good old days!
2. You can fast travel, though option is well hidden. You need to buy planeboat.
3. The few missions that game has are fun and worth the trouble you usually go through.
4. Simple and entertaining gameplay.

Cons
1. Very few missions in the game and to increase the length of the game you chase the unimaginable reputation(xp) requirements. You also need to purchase shops to overtake city. All of this require amount of money which you earn only in side missions. Problem is there is only one type of mission which can bring you anywhere near to your total money requirement. So you end up doing same mission over and over again.
2. Quite a long learning curve - Every time you end up with a complicated situation in the game, the reason comes out to that you were not able to fully understand some aspect of the game. There is a lot to learn to do things right way and it takes time.
3. Game map is basically a one big circuit with few roads built around it.
4. Gameplay wise there is hardly anything fair going on in the game.
5. Graphics are pretty outdated, even for 2006 standards.
6. Broken controller support, not all actions are assigned. This half support will keep you away from using any 3rd party app too.

Review
Pros
1. Even 7 years after game's release, Prey offers something you won't find elsewhere. A mix of a shooter and puzzle and very light horror elements. Your(protagonist's) soul can leave the body anytime at your will and get past barriers, thus creating some interesting puzzle gameplay.
2. Focus is fun - In Prey you never die, whenever you run out of health you are taken to other world where you get the chance to increase health. So even though challenge is missing it's still amazing experience.
3. Classic shooter, you can carry every gun you are able to lay your hands on, health doesn't recharge, ammo is plenty though.
4. Several types of portals, no you don't create them but sometimes you have to find them. I guess Valve got their motivation from Prey.

Cons
1. Storyline just enough to keep game going.

Save System: After mission completion. Within mission - Save anywhere subject to limted number of saves (No of saves allowed vary between 0 to 7 depending on difficulty level set by you).

Review
Pros
1. Not only game is lengthy to beat but every playthrough can be a totally different experience. With side quests it can take 50-100 hrs to beat.
2. Played 7 years after it's release, Oblivion is still an amazing experience.
3. The skill upgrade is really good, it totally depends on how much you do something. More you perform certain activity the better you become in it.

Cons
1. Main storyline is uninteresting and short.
2. No zoom out option in map.
3. Some characterS appear in multiple quests. These quests progress in the way they are scripted. So say you do a favour to someone in a quest, later on in a new quest same character may even refuse to talk to you. It feels quite absurd, at least dialogue options should change.