In order to make the game more interesting for multiplayer there is an additional feature over regular Tetris where users can use special blocks against their opponents. Switch field, nuke field and add lines are just a few of the ways you can use these blocks to disrupt those you are playing against.
The game, while simple in design could use better graphics to make it a little more appealing, while it does not really detract from the core gameplay it would be nice if there was more polish to the design. Luckily there are themes available online to help in this area, but of course it is up to the player to install these.
TetriNET expands on the familiar Tetris gameplay by allowing up to six players in a multiplayer mode. This works through online play or LAN, meaning you can play against anyone else that has the game installed on their PC.
While yes this is easily characterized as a casual game, there is still enough on offer to appeal even to the hardcore gamer. With different levels of difficulty as well as a complex system of match 3 gameplay that has the ability to stump even the most ardent puzzle fan, there is quite a lot that can appeal to just about anyone.
Frozen Bubble has multiplayer modes for online, LAN and on the same machine on one screen. This makes it versatile for those that like to play multiplayer but need to do so in different ways.
Those that are looking for a challenge in the gameplay will need to work for it a bit as the beginning of the game is quite easy, for the first 20 levels or so. After that the difficulty ramps up, but it does take a little bit of time to get there.