What game should I get which is under 5$?

Wait for the next sale.

The Binding of Isaac is a great game with a huge replayability.

edit : or wait for the next sale, right.

Mount and Blade Warband plus a load of other games are under 5$ on Amazon at the moment. Redeemable on Steam.

Fortix

The Binding of Isaac is amazing! I have played it for like 90 hours and its great. Also, To the Moon is on sale for $4 on GMG if you like an immersive and incredible story.

I say Binding of Isaac, just because of how much game time you can get out of it

I should have a leftover key from an humble bundle for Isaac, add me on steam, i'll give it to you :D

binding of isaac. unlimited fun, u'll never get tired

Fallout 3 GOTY / New Vegas ultimate from viagame.

If you want ill give you a copy of Binding of Issac for $3. It's tradeable not key

The Binding of Isaac, as many users already said. I had this on my old Steam account and I played this a lot. If you're an old-school lover, then you should buy the classic Sega games. Most of them are 2,49€.

Or wait for the Summer Sale ;)

Right now? PayDay the Heist is £3.45 or something, It's amazing

Skyward Collapse

This http://www.amazon.com/dp/B0083W649I/ref=hy-tab1-dvg-4?pf_rd_p=1559981142&pf_rd_s=merchandised-search-7&pf_rd_t=101&pf_rd_i=979455011&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=80E6779D55FE4D159279

Get the current Humble Weekly Bundle (with both Alan Wake's games)

Torchlight

Super Puzzle Platformer Deluxe

An indication: click on "5$ or less"

Payday the heist