If you liked a bit of Castle Crashers, you're going to love this. Portal Defenders sees players taking control of the Newgrounds creator Tom Fulp (and a cast of other Newgrounds regulars after you've unlocked them) as wave upon wave of enemies are sent in your direction. Your mission? Button-bash them all to death.

If you know your indie developers you'll recognise a good few names here, including a certain Armor Games developer and a guy in need of Closure. There's plenty to do here, with lots of bosses and mini-games to fill out the time, plus achievements of course.

There's a whole page dedicated to explaining Portal Defenders here, but if you'd rather just jump straight in, give this link a click.