Mine Siege

You have 4 basic tower types each splitting into 2 subgroups:
Normal – basic shot
Machinegun – shoots a lot faster, not too much damage though
Sniper – slow but very high damage and incredible ranges

Grenade – does splash damage
Splash – splash damage, more accurate
Cannon – Highest damage, but very slow and inaccurate

Slow – slows enemies
Freeze – slows enemies greatly
Stun – has a chance of stopping enemy for a short period

Poison – hit enemy suffers from poison – poison ignores armor
Mega poison – Increases poison damage greatly
Weaken – hit enemy has decreased armor and attack strength