For now,it reamains to be seen how long the game is going to be.A walkthrough of the game in the current planning state should be around 7 to 8 hours.I want this game to be a masterpiece.A standalone on Steam(if i get VALVE`s blessings).
Before i release it on steam though,i`m gonna need some donation help.I`ll open a kickstarter or a patreon 2-3 months before the Steam release.
The licenses for this game are expensive:
For HAVOC,the physics used in Portal 2`s engine is $25.000
For Source license(full Source license;if i have to)is going to be determined by VALVE themselves.(I`m probably going to need one if i want to market the mod
Also,in other news.Maybe,MAYBE,one or two years after releasing it on steam i maybe publish it on Android and iOS,as the current generation hardware used by phones should render the game playable,unlike Half-Life 2 and its episodes and Portal 1,being EXCLUSIVE to Nvidia Shield,which no one uses anymore.Anyways,the hardware used by current gen phones and tablets are way more superior.
UPDATE:No need for a Source license,i only publish on Steam