Some say this is the best of the Diablo 2 clones with better graphics. The base game is eight years old now and having played newer titles like Torchlight 2, Dungeon Siege 2 and 3 as well as others, I think that's selling it a bit short. It's held up well although you won't find features now taken for granted like player customization, Steam achievements, automapping and multiplayer party features. The game is engaging and challenging but just enough to keep pulling you along. There are no 20 minute play sessions, more like a few hours or more.
The game looks great, the maps are interesting but sometimes it does seem a bit long between merchants and you can run out of health potions quickly. When that happens it can be a bit of a grind but at least you get XP for your trouble. The camera angles are failry limited but you can zoom in and out. There are times I wish I had more control of the camera but it doesn't really get in the way of playing the game. Unlike Dungeon Siege 3 whose camera controls were so bad they made the game unplayable with their wild random swings. Titan Quests stays locked on in comparison.
If I had one complaint in the single player it would be the combat system. You're forced to fight one enemy at a time even if you're going up against 30 baddies. You spend a lot of time selecting individual opponents and chugging health potions to get through it. At least I haven't been trapped by a such a group. There always seems to be an avenue to run away when needed and the baddies only chase you for a short time.
The ability to save on the fly is great but expect to have to hack through everything you already dispatched again when you come back. I kind of like things I kill to stay dead in the same game. Altough to it's credit if you don't leave the game session, dead things will stay dead. I just wish the saves would follow suit. It's another example of how the game can be a bit of a grind in some places.
You can customize weapons and armor with enchantments and the inventory system is very much like torchlight or any other RPG with inventory slots set up in a grid. The skills tree is easy enough to understand but the game is a bit stingy with skill points meaning your special abilities won't do you much good till you're done with the game. It can be annoying to get beaten by a lower level enemy who has a special ability that you're nowhere near achieving.
There is fast travel capability that you can use on the fly which is something I liked in Torchlight 2 and Dungeon Siege 2 where you can leave and then transport back to exactly where you were. That's a time saver and potentially a life saver when you run out of health potions or fill up you rinventory with loot.
If this game really falls down anywhere, however, it's the multiplayer/co-op gameplay. Yes it has LAN play which is welcome but unlike newer games in this genre XP and loot aren't shared. between players Which means if you're level 3 and you go into a game with a level 16 player all they can really do for you is play bodyguard which means there's not much in it for them. The loot drops don't level with the player either so often times you'll pick up items you won't be able to use or are useless scarp metal. Although that's a common complaint in RPG's and not just Titan Quest.
In the end even with its flaws I really liked this game and the benefits far outweigh the annoyances and goes in the list of my top 3 favorite RPG's so far.