This is the Tyranid expansion to the Space Marine Game.
The supplement contains a 72-page soft-bound rule-book with 16 colour pages and colour covers. Contents include:
82 swarm cards
24 hive mind cards
8 area effect counters
24 mycetic spore counters
Rules are given for building an epic tyranid force and for the new tyranid troop types (carnifex, zoanthrope, haruspex, dactylis, gargoyle, lictor, hormagaunt, termagants, genestealers, trygon, exocrine, tyranid warriors, biovore, dominatrix, harridan and hive tyrants) plus the bio-titans (hierophant and hierodule). A force's organisation is represented by a collection of hexagonal tiles.