Battle for Wesnoth.

It's free, too. I've never played Nippon Ichi games, so I don't know if it's similar to 'em at all, but it's a good game.

Tactics Ogre: Let us cling together

+1 for Temple of Elemental Evil and Fallout Tactics

The first game offers a variety of actions each turn and most of the battles are pretty hard. It's a game that you better read its manual before playing.There are many classes to choose, lots of items to loot and tons of spells to cast. Some people say that the game is all about the combat, but you have plenty of side-quests and you can advance using different methods. However, the game is worth playing even only for its combat system, it's so good.

Fallout Tactics offers both real time gameplay and turn based, you can choose which one you like more and you can change from one to the other at any time. You can finish objectives differently, you can sneak and strike at point-blank with shotguns and sub-machine guns, use a meele weapon and slice in half, snipe from long distance, throw grenades, lure into traps or an ambush. It's a lot of fun to play, the only problem is that compared to other Fallout games you have practically no choice in dialogue and you have to fight pretty much all the game.

Another +1 for ToEE and Fallout: Tactics.

ToEE is especially fun if you're familiar with 3.5s rules, and you go get the mod that lets you have a full 8-man party. It gives you more contrl over what your team does than any game I've seen to date, with the way D&D mechanics work, being -designed- for tactical team play, you can have a wizard who keeps Enlarge Person memorized, and a fighter who specializes in Attacks of Opportunity with a Spiked Chain and has Great Cleave.. >.>

Fallout Tactics is almost as good for that, but it's also got some major weak points. The other thing to remember about Fallout: Tactics is.. it's not Fallout. If you've liked the Fallout games for their story and lore, pretend than the game doesn't have Fallout in the name and you will be a lot happier.

Incubation & Frozen Synapse

ToEE is extrememly tactical. Play it in Hardcore (no loading possible) for added thrill. You will finally get to use these potions... Never finished it in hardcore, but went quite far.

Fallout Tactics's good - but you said you did not like it. Fine.

You could also try Age of Wonders, which is like Heroes of M&M, with more RPG elements, more fun, more tactic and strategy (i.e. your units can hide behind obstacles to shoot during battle, and you will try to get the high ground), and much less beautiful. Play the third one directly ("Shadow Magic").

Beyond what I read so far, there are:

Commandos games.
Fantasy Wars (if you can get over the finicky user interface, you get a very tactical fantasy game with RPG elements thrown in)

Outside of GOG, there is the Myth series as long as you don't mind some real-time as opposed to turn based tactical...

Commandos is a very "special" game not for everyone. It can be damn frustrating when come to time ur action and units to 0.5sec and so.

I can't agree with you, Fallout Tactics is still a Fallout game, because of its atmosphere. You still are on a wasteland, visitng old, ruined cities, encountering ghouls, deathclaws, supermutants. You are using pre-war computers in bunkers.

Good squad based games:
X-Com 1 - 3
SWAT 4
UFO Afterlight
Commandos 1 & 2
Star Wars Republic Commando
Advanced Warfighter 1 & 2 (PC only)
Fallout Tactics
Brothers in Arms 1 - 3

Tactical war games:
The Total Wars (you can play historical battles without the strategic map)
XIII Century (effectively Total War without the map)
Crusaders Thy Kingdom Come (substantially bettered by King Arthur, but that's far from purely tactical)

+1

also, silent storm, if one can find it (amazon maybe?)

Commando is not really RPG, and Fantasy Wars is not really good :)

SWAT 3!

sure.

It looks like Fallout. If that's what matters to you then it's Fallout, sure. For those of us though, who like Fallout for more than the atmosphere, Fallout: Tactics is about as much Fallout as Fallout 3 is.

Tactics lacks the reign to choose what you do in the world, it lacks the sense of humor, it screws with the lore.. and it just feels like it's missing something.

I played through maps 15 and 16 (the one where you have to off 3 guys around the map at the same time) with a laptop touchpad. They took me a total of 8 hours. It's a game of patience and quickloading.