It is pretty cool. The canon is debatable though. This is canon to Penny Arcade, Homestar and Sam and Max, but not TF2 as the Heavy's lines were written by Telltale and Heavy later was given a different backstory in Meet the Director, rendering Heavy's stories in-game non-canon.
However, I have a workaround. In Meet the Director, the Mercs were tricked by the Admin to talk to a movie director about their lives and jobs. She later clarified that doing so was violating their contracts. (She's the admin, she does what she wants). So perhaps Heavy altered details about his own life to avoid breeching contract in Poker Night.
Another question is how did Heavy get to this crossover universe set in 2010? I blame Engi. He'd previously been there; I assume, thanks to Australium further enhancing his brainpower (but just a little; not enough for the moustache to grow), he built a super inter-dimensional teleporter.
I think TF is definitely connected to other game universes. Bill's hat landed in the TF2niverse through a portal created accidentally in a science experiment Bill tried. Somehow, at some point after he died, Ellis' hat and a frying pan fell through said portal. TF Classic has Black Mesa crates from Half-Life 1. TF2 has plenty of Aperture Science related miscs and an upcoming one from the What's in the Portal Soundtrack? Box. So those tie it in with the Half-Life/Portal universe, meaning TF has its own incarnation of said labs.
Dungeon Defenders managed to find a Portal gun that had made its way into their Universe and used it to cross over into the TF2niverse to bring in some of the classes as familiars to fight alongside them. In Poker Night, Heavy claims his favorite game is "Where's an Egg?", which imo further connects his Universe with the Homestar one. Winning the Dangeresque Two, Lugermorph, License to Maim and Enthusiast's Timepiece imo help to cement the Penny Arcade, Homestar and Sam and Max universes' connections to the TF2niverse.
Of course, this is all my personal take on this. Canon's confusing stuff.
However, I have a workaround. In Meet the Director, the Mercs were tricked by the Admin to talk to a movie director about their lives and jobs. She later clarified that doing so was violating their contracts. (She's the admin, she does what she wants). So perhaps Heavy altered details about his own life to avoid breeching contract in Poker Night.
Another question is how did Heavy get to this crossover universe set in 2010? I blame Engi. He'd previously been there; I assume, thanks to Australium further enhancing his brainpower (but just a little; not enough for the moustache to grow), he built a super inter-dimensional teleporter.
I think TF is definitely connected to other game universes. Bill's hat landed in the TF2niverse through a portal created accidentally in a science experiment Bill tried. Somehow, at some point after he died, Ellis' hat and a frying pan fell through said portal. TF Classic has Black Mesa crates from Half-Life 1. TF2 has plenty of Aperture Science related miscs and an upcoming one from the What's in the Portal Soundtrack? Box. So those tie it in with the Half-Life/Portal universe, meaning TF has its own incarnation of said labs.
Dungeon Defenders managed to find a Portal gun that had made its way into their Universe and used it to cross over into the TF2niverse to bring in some of the classes as familiars to fight alongside them. In Poker Night, Heavy claims his favorite game is "Where's an Egg?", which imo further connects his Universe with the Homestar one. Winning the Dangeresque Two, Lugermorph, License to Maim and Enthusiast's Timepiece imo help to cement the Penny Arcade, Homestar and Sam and Max universes' connections to the TF2niverse.
Of course, this is all my personal take on this. Canon's confusing stuff.