@scratch_seal
yes there is a hidden mechanic
laser chains
about 5100 kills are possible on extreme with a very, very good chain
and again...again...again
the targetter:
http://playr.blogspot.com/2008/04/new-turrent.html#links
forum is down atm so i can't give you the link to the combonly thread
just for the record
the laserchain that holds the (unhacked)top1 score on the original onslaught site http://onslaught.playr.co.uk/scores/scores.best.1.html
did 3.1*10^26 damage
three hundred sixteen septillion
laser chains are included
"Green turrets can link together, where they fire at each other in a chain, each link along the chain adding an extra 25% to the laser beam's power."
how you make best use of that is not part of the game instructions
but they are a bit outdated
well the HP don't rise gradually, but they rise slower in the later waves(except for extreme)
at first the HP get multiplied by 1.4 in each wave
in later waves it's only 1.02
in extreme every waves multiplies with 1.25 so that starts of very easy but rises to impossibility faster than the others
@weebleo
you get sandbox for 4000 kills on medium
you can not beat the game at all
scoring 4000 kills is not the final challange
and doing this on hard and extreme is another matter
targeter
http://playr.blogspot.com/2008/04/new-turrent.html#links
combonly
http://z4.invisionfree.com/playr_forum/index.php?showtopic=2068
@xDarknightx
the "superturrets" fusion. sniper and railgun can not combo with anything and are not affected by any modifying turrets
@Masclins finishing the game? there is no finish
@Kasumi_Shinzawai
http://onslaught.playr.co.uk/about.combos.html
the new version should be able to support badges
@gimmy777
Keyboard Shortcuts:
1 - Builds a Blue Turret
2 - Builds a Green Turret
3 - Builds a Red Turret
4 - Builds a Yellow Turret
5 - Builds a Range Modifier
6 - Builds a Small Damage Modifier
7 - Builds a RoF Modifier
8 - Builds a Large Damage Modifier
9 - Builds a Damage Exchanger
0 - Builds a Range Exchanger
Space - Sends the next level
P - Pauses the game
S - Sells the selected turret
M - Move a turret. Costs $500
R - Toggles the view of range of turrets
C - Toggles the view turrets in combo range
Shift + Clicking will also spend all available cash on your selected upgrade.
I - View game menu
G - View game options, including wave spacing
 "Onslaught2"){kind=icon}